/*
 *
 *  Realtek Bluetooth USB driver
 *
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/skbuff.h>
#include <linux/usb.h>

#include <linux/ioctl.h>
#include <linux/io.h>
#include <linux/firmware.h>
#include <linux/vmalloc.h>
#include <linux/fs.h>
#include <linux/uaccess.h>
#include <linux/reboot.h>

#include "rtk_btusb.h"

#define RTKBT_RELEASE_NAME "20200109_BT_ANDROID_10.0"
#define VERSION            "5.2.1"

#define SUSPNED_DW_FW      0
#define SET_WAKEUP_DEVICE  0


static spinlock_t queue_lock;
static spinlock_t running_flag_lock;
static volatile uint16_t driver_state;

#if SUSPNED_DW_FW
static firmware_info * fw_info_4_suspend;
#endif

static uint32_t usb_info;

static patch_info fw_patch_table[] = {
/* { vid, pid, lmp_sub_default, lmp_sub, everion, mp_fw_name, fw_name, config_name, fw_cache, fw_len, mac_offset } */
{ 0x0BDA, 0x1724, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723A */
{ 0x0BDA, 0x8723, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AE */
{ 0x0BDA, 0xA723, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AE for LI */
{ 0x0BDA, 0x0723, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AE */
{ 0x13D3, 0x3394, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AE for Azurewave*/

{ 0x0BDA, 0x0724, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AU */
{ 0x0BDA, 0x8725, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AU */
{ 0x0BDA, 0x872A, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AU */
{ 0x0BDA, 0x872B, 0x1200, 0, 0, "mp_rtl8723a_fw", "rtl8723a_fw", "rtl8723a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* 8723AU */

{ 0x0BDA, 0xb720, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723bu_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BU */
{ 0x0BDA, 0xb72A, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723bu_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BU */
{ 0x0BDA, 0xb728, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for LC */
{ 0x0BDA, 0xb723, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE */
{ 0x0BDA, 0xb72B, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE */
{ 0x0BDA, 0xb001, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for HP */
{ 0x0BDA, 0xb002, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE */
{ 0x0BDA, 0xb003, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE */
{ 0x0BDA, 0xb004, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE */
{ 0x0BDA, 0xb005, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE */

{ 0x13D3, 0x3410, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for Azurewave */
{ 0x13D3, 0x3416, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for Azurewave */
{ 0x13D3, 0x3459, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for Azurewave */
{ 0x0489, 0xE085, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for Foxconn */
{ 0x0489, 0xE08B, 0x8723, 0, 0, "mp_rtl8723b_fw", "rtl8723b_fw", "rtl8723b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8723BE for Foxconn */

{ 0x0BDA, 0x2850, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au_fw", "rtl8761a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AU */
{ 0x0BDA, 0xA761, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au_fw", "rtl8761a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AU only */
{ 0x0BDA, 0x818B, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761aw8192eu_fw", "rtl8761aw8192eu_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AW + 8192EU */
{ 0x0BDA, 0x818C, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761aw8192eu_fw", "rtl8761aw8192eu_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AW + 8192EU */
{ 0x0BDA, 0x8760, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8192ee_fw", "rtl8761a_config",        NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AU + 8192EE */
{ 0x0BDA, 0xB761, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au_fw",       "rtl8761a_config",        NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AUV only */
{ 0x0BDA, 0x8761, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8192ee_fw", "rtl8761a_config",        NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AU + 8192EE for LI */
{ 0x0BDA, 0x8A60, 0x8761, 0, 0, "mp_rtl8761a_fw", "rtl8761au8812ae_fw", "rtl8761a_config",        NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8761AU + 8812AE */
{ 0x0BDA, 0x8771, 0x8761, 0, 0, "mp_rtl8761b_fw", "rtl8761b_fw", "rtl8761b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8761BU */
{ 0x0BDA, 0xa725, 0x8761, 0, 0, "mp_rtl8725a_fw", "rtl8725a_fw", "rtl8725a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8725AU */
{ 0x0BDA, 0xa72A, 0x8761, 0, 0, "mp_rtl8725a_fw", "rtl8725a_fw", "rtl8725a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8725AU BT only */

{ 0x0BDA, 0x8821, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AE */
{ 0x0BDA, 0x0821, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AE */
{ 0x0BDA, 0x0823, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AU */
{ 0x13D3, 0x3414, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AE */
{ 0x13D3, 0x3458, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AE */
{ 0x13D3, 0x3461, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AE */
{ 0x13D3, 0x3462, 0x8821, 0, 0, "mp_rtl8821a_fw", "rtl8821a_fw", "rtl8821a_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_1_2, MAX_PATCH_SIZE_24K}, /* RTL8821AE */

{ 0x0BDA, 0xB822, 0x8822, 0, 0, "mp_rtl8822b_fw", "rtl8822b_fw", "rtl8822b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_24K}, /* RTL8822BE */
{ 0x0BDA, 0xB82C, 0x8822, 0, 0, "mp_rtl8822b_fw", "rtl8822b_fw", "rtl8822b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_24K}, /* RTL8822BU */
{ 0x0BDA, 0xB81D, 0x8822, 0, 0, "mp_rtl8822b_fw", "rtl8822b_fw", "rtl8822b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_24K}, /* RTL8822BU BT only */
{ 0x0BDA, 0xB82E, 0x8822, 0, 0, "mp_rtl8822b_fw", "rtl8822b_fw", "rtl8822b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_24K}, /* RTL8822BU-VN */
{ 0x0BDA, 0xB023, 0x8822, 0, 0, "mp_rtl8822b_fw", "rtl8822b_fw", "rtl8822b_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_24K}, /* RTL8822BE */
{ 0x0BDA, 0xB703, 0x8703, 0, 0, "mp_rtl8723c_fw", "rtl8723c_fw", "rtl8723c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_24K}, /* RTL8723CU */
/* todo: RTL8703BU */

{ 0x0BDA, 0xD723, 0x8723, 0, 0, "mp_rtl8723d_fw", "rtl8723d_fw", "rtl8723d_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8723DU */
{ 0x0BDA, 0xD72A, 0x8723, 0, 0, "mp_rtl8723d_fw", "rtl8723d_fw", "rtl8723d_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8723DU BT only */
{ 0x0BDA, 0xD720, 0x8723, 0, 0, "mp_rtl8723d_fw", "rtl8723d_fw", "rtl8723d_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8723DE */
{ 0x0BDA, 0xB820, 0x8821, 0, 0, "mp_rtl8821c_fw", "rtl8821c_fw", "rtl8821c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8821CU */
{ 0x0BDA, 0xC820, 0x8821, 0, 0, "mp_rtl8821c_fw", "rtl8821c_fw", "rtl8821c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8821CU */
{ 0x0BDA, 0xC82A, 0x8821, 0, 0, "mp_rtl8821c_fw", "rtl8821c_fw", "rtl8821c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8821CU BT only */
{ 0x0BDA, 0xC821, 0x8821, 0, 0, "mp_rtl8821c_fw", "rtl8821c_fw", "rtl8821c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_3PLUS, MAX_PATCH_SIZE_40K}, /* RTL8821CE */
/* todo: RTL8703CU */
{ 0x0BDA, 0xC82C, 0x8822, 0, 0, "mp_rtl8822c_fw", "rtl8822c_fw", "rtl8822c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8822CU */
{ 0x0BDA, 0xC82E, 0x8822, 0, 0, "mp_rtl8822c_fw", "rtl8822c_fw", "rtl8822c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8822CU-VN */
{ 0x0BDA, 0xC81D, 0x8822, 0, 0, "mp_rtl8822c_fw", "rtl8822c_fw", "rtl8822c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8822CU BT only */
{ 0x0BDA, 0xC82F, 0x8822, 0, 0, "mp_rtl8822c_fw", "rtl8822c_fw", "rtl8822c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8822CE-VS */
{ 0x0BDA, 0xC822, 0x8822, 0, 0, "mp_rtl8822c_fw", "rtl8822c_fw", "rtl8822c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8822CE */
{ 0x0BDA, 0xB00C, 0x8822, 0, 0, "mp_rtl8822c_fw", "rtl8822c_fw", "rtl8822c_config", NULL, 0, CONFIG_MAC_OFFSET_GEN_4PLUS, MAX_PATCH_SIZE_40K}, /* RTL8822CE */
/* NOTE: must append patch entries above the null entry */
{ 0, 0, 0, 0, 0, NULL, NULL, NULL, NULL, 0, 0, 0 }
};

struct btusb_data {
	struct hci_dev	   *hdev;
	struct usb_device	*udev;
	struct usb_interface *intf;
	struct usb_interface *isoc;

	spinlock_t lock;

	unsigned long flags;

	struct work_struct work;
	struct work_struct waker;

	struct usb_anchor tx_anchor;
	struct usb_anchor intr_anchor;
	struct usb_anchor bulk_anchor;
	struct usb_anchor isoc_anchor;
	struct usb_anchor deferred;
	int tx_in_flight;
	spinlock_t txlock;

	struct usb_endpoint_descriptor *intr_ep;
	struct usb_endpoint_descriptor *bulk_tx_ep;
	struct usb_endpoint_descriptor *bulk_rx_ep;
	struct usb_endpoint_descriptor *isoc_tx_ep;
	struct usb_endpoint_descriptor *isoc_rx_ep;

	__u8 cmdreq_type;

	unsigned int sco_num;
	int isoc_altsetting;
	int suspend_count;
	uint16_t sco_handle;
//#ifdef CONFIG_HAS_EARLYSUSPEND
#if 0
	struct early_suspend early_suspend;
#else
	struct notifier_block pm_notifier;
	struct notifier_block reboot_notifier;
#endif
	firmware_info * fw_info;

#ifdef CONFIG_SCO_OVER_HCI
	RTK_sco_card_t  *pSCOSnd;
#endif
};

int download_patch(firmware_info *fw_info, int cached);
int reset_controller(firmware_info *fw_info);


/********************************************************
**	this function first check the value, if true then set value
**
*********************************************************/
static inline bool check_set_driver_state_value(uint16_t check_value, uint16_t change_value)
{
	bool res;
	spin_lock(&running_flag_lock);
	if ((driver_state & check_value) != check_value) {
		res = false;
	} else {
		driver_state |= change_value;
		res = true;
	}
	spin_unlock(&running_flag_lock);
	return res;
}

static inline uint16_t get_driver_state_value(void)
{
	uint16_t state;
	spin_lock(&running_flag_lock);
	state = driver_state;
	spin_unlock(&running_flag_lock);
	return state;
}

static inline void clear_driver_state(uint16_t clear_value)
{
	spin_lock(&running_flag_lock);
	driver_state &= (~clear_value);
	spin_unlock(&running_flag_lock);
}

static inline void set_driver_state_value(uint16_t change_value)
{
	spin_lock(&running_flag_lock);
	driver_state |= change_value;
	spin_unlock(&running_flag_lock);
}

#if SUSPNED_DW_FW
static int download_suspend_patch(firmware_info *fw_info, int cached);
#endif
#if SET_WAKEUP_DEVICE
static void set_wakeup_device_from_conf(firmware_info *fw_info);
int set_wakeup_device(firmware_info *fw_info, uint8_t *wakeup_bdaddr);
#endif

static void rtk_free(struct btusb_data *data)
{
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 1)
	kfree(data);
#endif
	return;
}

static struct btusb_data *rtk_alloc(struct usb_interface *intf)
{
	struct btusb_data *data;
#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 7, 1)
	data = kzalloc(sizeof(*data), GFP_KERNEL);
#else
	data = devm_kzalloc(&intf->dev, sizeof(*data), GFP_KERNEL);
#endif
	return data;
}

static void print_acl(struct sk_buff *skb, int direction)
{
#if PRINT_ACL_DATA
	uint wlength = skb->len;
	u16 *handle = (u16 *)(skb->data);
	u16 len = *(handle+1);
	u8 *acl_data = (u8 *)(skb->data);

	RTK_INFO("%s: direction %d, handle %04x, len %d",
			__func__, direction, *handle, len);
#endif
}

static void print_sco(struct sk_buff *skb, int direction)
{
#if PRINT_SCO_DATA
	uint wlength = skb->len;
	u16 *handle = (u16 *)(skb->data);
	u8 len = *(u8 *)(handle+1);
	u8 *sco_data = (u8 *)(skb->data);

	RTKBT_INFO("%s: direction %d, handle %04x, len %d",
			__func__, direction, *handle, len);
#endif
}

static void print_error_command(struct sk_buff *skb)
{
	uint wlength = skb->len;
	uint icount = 0;
	u16 *opcode = (u16 *)(skb->data);
	u8 *cmd_data = (u8 *)(skb->data);
	u8 len = *(cmd_data + 2);

	switch (*opcode) {
	case HCI_OP_INQUIRY:
		printk("HCI_OP_INQUIRY");
		break;
	case HCI_OP_INQUIRY_CANCEL:
		printk("HCI_OP_INQUIRY_CANCEL");
		break;
	case HCI_OP_EXIT_PERIODIC_INQ:
		printk("HCI_OP_EXIT_PERIODIC_INQ");
		break;
	case HCI_OP_CREATE_CONN:
		printk("HCI_OP_CREATE_CONN");
		break;
	case HCI_OP_DISCONNECT:
		printk("HCI_OP_DISCONNECT");
		break;
	case HCI_OP_CREATE_CONN_CANCEL:
		printk("HCI_OP_CREATE_CONN_CANCEL");
		break;
	case HCI_OP_ACCEPT_CONN_REQ:
		printk("HCI_OP_ACCEPT_CONN_REQ");
		break;
	case HCI_OP_REJECT_CONN_REQ:
		printk("HCI_OP_REJECT_CONN_REQ");
		break;
	case HCI_OP_AUTH_REQUESTED:
		printk("HCI_OP_AUTH_REQUESTED");
		break;
	case HCI_OP_SET_CONN_ENCRYPT:
		printk("HCI_OP_SET_CONN_ENCRYPT");
		break;
	case HCI_OP_REMOTE_NAME_REQ:
		printk("HCI_OP_REMOTE_NAME_REQ");
		break;
	case HCI_OP_READ_REMOTE_FEATURES:
		printk("HCI_OP_READ_REMOTE_FEATURES");
		break;
	case HCI_OP_SNIFF_MODE:
		printk("HCI_OP_SNIFF_MODE");
		break;
	case HCI_OP_EXIT_SNIFF_MODE:
		printk("HCI_OP_EXIT_SNIFF_MODE");
		break;
	case HCI_OP_SWITCH_ROLE:
		printk("HCI_OP_SWITCH_ROLE");
		break;
	case HCI_OP_SNIFF_SUBRATE:
		printk("HCI_OP_SNIFF_SUBRATE");
		break;
	case HCI_OP_RESET:
		printk("HCI_OP_RESET");
		break;
	case HCI_OP_Write_Extended_Inquiry_Response:
		printk("HCI_Write_Extended_Inquiry_Response");
		break;

	default:
		printk("CMD");
		break;
	}
	printk(":%04x,len:%d,", *opcode, len);
	for (icount = 3; (icount < wlength) && (icount < 24); icount++)
		printk("%02x ", *(cmd_data+icount));
	printk("\n");
}

static void print_command(struct sk_buff *skb)
{
#if PRINT_CMD_EVENT
	print_error_command(skb);
#endif
}

#if CONFIG_BLUEDROID
/* Global parameters for bt usb char driver */
#define BT_CHAR_DEVICE_NAME "rtkbt_dev"
static struct sk_buff_head btchr_readq;
static wait_queue_head_t btchr_read_wait;
static wait_queue_head_t bt_drv_state_wait;
static dev_t bt_devid; /* bt char device number */
static struct cdev bt_char_dev; /* bt character device structure */
static struct class *bt_char_class; /* device class for usb char driver */
static int bt_reset;
/* HCI device & lock */
DEFINE_RWLOCK(hci_dev_lock);
struct hci_dev *ghdev;

static void print_event(struct sk_buff *skb)
{
#if PRINT_CMD_EVENT
	uint wlength = skb->len;
	uint icount = 0;
	u8 *opcode = (u8 *)(skb->data);
	u8 len = *(opcode+1);

	switch (*opcode) {
	case HCI_EV_INQUIRY_COMPLETE:
		printk("HCI_EV_INQUIRY_COMPLETE");
		break;
	case HCI_EV_INQUIRY_RESULT:
		printk("HCI_EV_INQUIRY_RESULT");
		break;
	case HCI_EV_CONN_COMPLETE:
		printk("HCI_EV_CONN_COMPLETE");
		break;
	case HCI_EV_CONN_REQUEST:
		printk("HCI_EV_CONN_REQUEST");
		break;
	case HCI_EV_DISCONN_COMPLETE:
		printk("HCI_EV_DISCONN_COMPLETE");
		break;
	case HCI_EV_AUTH_COMPLETE:
		printk("HCI_EV_AUTH_COMPLETE");
		break;
	case HCI_EV_REMOTE_NAME:
		printk("HCI_EV_REMOTE_NAME");
		break;
	case HCI_EV_ENCRYPT_CHANGE:
		printk("HCI_EV_ENCRYPT_CHANGE");
		break;
	case HCI_EV_CHANGE_LINK_KEY_COMPLETE:
		printk("HCI_EV_CHANGE_LINK_KEY_COMPLETE");
		break;
	case HCI_EV_REMOTE_FEATURES:
		printk("HCI_EV_REMOTE_FEATURES");
		break;
	case HCI_EV_REMOTE_VERSION:
		printk("HCI_EV_REMOTE_VERSION");
		break;
	case HCI_EV_QOS_SETUP_COMPLETE:
		printk("HCI_EV_QOS_SETUP_COMPLETE");
		break;
	case HCI_EV_CMD_COMPLETE:
		printk("HCI_EV_CMD_COMPLETE");
		break;
	case HCI_EV_CMD_STATUS:
		printk("HCI_EV_CMD_STATUS");
		break;
	case HCI_EV_ROLE_CHANGE:
		printk("HCI_EV_ROLE_CHANGE");
		break;
	case HCI_EV_NUM_COMP_PKTS:
		printk("HCI_EV_NUM_COMP_PKTS");
		break;
	case HCI_EV_MODE_CHANGE:
		printk("HCI_EV_MODE_CHANGE");
		break;
	case HCI_EV_PIN_CODE_REQ:
		printk("HCI_EV_PIN_CODE_REQ");
		break;
	case HCI_EV_LINK_KEY_REQ:
		printk("HCI_EV_LINK_KEY_REQ");
		break;
	case HCI_EV_LINK_KEY_NOTIFY:
		printk("HCI_EV_LINK_KEY_NOTIFY");
		break;
	case HCI_EV_CLOCK_OFFSET:
		printk("HCI_EV_CLOCK_OFFSET");
		break;
	case HCI_EV_PKT_TYPE_CHANGE:
		printk("HCI_EV_PKT_TYPE_CHANGE");
		break;
	case HCI_EV_PSCAN_REP_MODE:
		printk("HCI_EV_PSCAN_REP_MODE");
		break;
	case HCI_EV_INQUIRY_RESULT_WITH_RSSI:
		printk("HCI_EV_INQUIRY_RESULT_WITH_RSSI");
		break;
	case HCI_EV_REMOTE_EXT_FEATURES:
		printk("HCI_EV_REMOTE_EXT_FEATURES");
		break;
	case HCI_EV_SYNC_CONN_COMPLETE:
		printk("HCI_EV_SYNC_CONN_COMPLETE");
		break;
	case HCI_EV_SYNC_CONN_CHANGED:
		printk("HCI_EV_SYNC_CONN_CHANGED");
		break;
	case HCI_EV_SNIFF_SUBRATE:
		printk("HCI_EV_SNIFF_SUBRATE");
		break;
	case HCI_EV_EXTENDED_INQUIRY_RESULT:
		printk("HCI_EV_EXTENDED_INQUIRY_RESULT");
		break;
	case HCI_EV_IO_CAPA_REQUEST:
		printk("HCI_EV_IO_CAPA_REQUEST");
		break;
	case HCI_EV_SIMPLE_PAIR_COMPLETE:
		printk("HCI_EV_SIMPLE_PAIR_COMPLETE");
		break;
	case HCI_EV_REMOTE_HOST_FEATURES:
		printk("HCI_EV_REMOTE_HOST_FEATURES");
		break;
	default:
		printk("event");
		break;
	}
	printk(":%02x,len:%d,", *opcode, len);
	for (icount = 2; (icount < wlength) && (icount < 24); icount++)
		printk("%02x ", *(opcode+icount));
	printk("\n");
#endif
}

static inline ssize_t usb_put_user(struct sk_buff *skb,
		char __user *buf, int count)
{
	char __user *ptr = buf;
	int len = min_t(unsigned int, skb->len, count);

	if (copy_to_user(ptr, skb->data, len))
		return -EFAULT;

	return len;
}

static struct sk_buff *rtk_skb_queue[QUEUE_SIZE];
static int rtk_skb_queue_front;
static int rtk_skb_queue_rear;

static void rtk_enqueue(struct sk_buff *skb)
{
	unsigned long flags;
	spin_lock_irqsave(&queue_lock, flags);
	if (rtk_skb_queue_front == (rtk_skb_queue_rear + 1) % QUEUE_SIZE) {
		/*
		 * If queue is full, current solution is to drop
		 * the following entries.
		 */
		RTKBT_WARN("%s: Queue is full, entry will be dropped", __func__);
	} else {
		rtk_skb_queue[rtk_skb_queue_rear] = skb;

		rtk_skb_queue_rear++;
		rtk_skb_queue_rear %= QUEUE_SIZE;

	}
	spin_unlock_irqrestore(&queue_lock, flags);
}

static struct sk_buff *rtk_dequeue_try(unsigned int deq_len)
{
	struct sk_buff *skb;
	struct sk_buff *skb_copy;

	if (rtk_skb_queue_front == rtk_skb_queue_rear) {
		RTKBT_WARN("%s: Queue is empty", __func__);
		return NULL;
	}

	skb = rtk_skb_queue[rtk_skb_queue_front];
	if (deq_len >= skb->len) {
		rtk_skb_queue[rtk_skb_queue_front] = NULL;
		rtk_skb_queue_front++;
		rtk_skb_queue_front %= QUEUE_SIZE;

		/*
		 * Return skb addr to be dequeued, and the caller
		 * should free the skb eventually.
		 */
		return skb;
	} else {
		skb_copy = pskb_copy(skb, GFP_ATOMIC);
		skb_pull(skb, deq_len);
		/* Return its copy to be freed */
		return skb_copy;
	}
}

static inline int is_queue_empty(void)
{
	return (rtk_skb_queue_front == rtk_skb_queue_rear) ? 1 : 0;
}

static void rtk_clear_queue(void)
{
	struct sk_buff *skb;
	unsigned long flags;
	spin_lock_irqsave(&queue_lock, flags);
	while (!is_queue_empty()) {
		skb = rtk_skb_queue[rtk_skb_queue_front];
		rtk_skb_queue[rtk_skb_queue_front] = NULL;
		rtk_skb_queue_front++;
		rtk_skb_queue_front %= QUEUE_SIZE;
		if (skb) {
			kfree_skb(skb);
		}
	}
	spin_unlock_irqrestore(&queue_lock, flags);
}

/*
 * Realtek - Integrate from hci_core.c
 */

/* Get HCI device by index.
 * Device is held on return. */
static struct hci_dev *hci_dev_get(int index)
{
	if (index != 0)
		return NULL;

	return ghdev;
}

/* ---- HCI ioctl helpers ---- */
static int hci_dev_open(__u16 dev)
{
	struct hci_dev *hdev;
	int ret = 0;

	RTKBT_DBG("%s: dev %d", __func__, dev);

	hdev = hci_dev_get(dev);
	if (!hdev) {
		RTKBT_ERR("%s: Failed to get hci dev[Null]", __func__);
		return -ENODEV;
	}

	if (test_bit(HCI_UNREGISTER, &hdev->flags)) {
		ret = -ENODEV;
		goto done;
	}

	if (test_bit(HCI_UP, &hdev->flags)) {
		ret = -EALREADY;
		goto done;
	}

done:
	return ret;
}

static int hci_dev_do_close(struct hci_dev *hdev)
{
	if (hdev->flush)
		hdev->flush(hdev);
	/* After this point our queues are empty
	 * and no tasks are scheduled. */
	hdev->close(hdev);
	/* Clear flags */
	hdev->flags = 0;
	memset(&hdev->conn_hash, 0, sizeof(struct hci_conn_hash));
	return 0;
}

static int hci_dev_close(__u16 dev)
{
	struct hci_dev *hdev;
	int err;
	hdev = hci_dev_get(dev);
	if (!hdev) {
		RTKBT_ERR("%s: failed to get hci dev[Null]", __func__);
		return -ENODEV;
	}

	err = hci_dev_do_close(hdev);

	return err;
}

static struct hci_dev *hci_alloc_dev(void)
{
	struct hci_dev *hdev;

	hdev = kzalloc(sizeof(struct hci_dev), GFP_KERNEL);
	if (!hdev)
		return NULL;

	return hdev;
}

/* Free HCI device */
static void hci_free_dev(struct hci_dev *hdev)
{
	kfree(hdev);
}

/* Register HCI device */
static int hci_register_dev(struct hci_dev *hdev)
{
	int i, id;

	RTKBT_DBG("%s: %p name %s bus %d", __func__, hdev, hdev->name, hdev->bus);
	/* Do not allow HCI_AMP devices to register at index 0,
	 * so the index can be used as the AMP controller ID.
	 */
	id = (hdev->dev_type == HCI_BREDR) ? 0 : 1;

	write_lock(&hci_dev_lock);

	sprintf(hdev->name, "hci%d", id);
	hdev->id = id;
	hdev->flags = 0;
	mutex_init(&hdev->lock);

	RTKBT_DBG("%s: id %d, name %s", __func__, hdev->id, hdev->name);


	for (i = 0; i < NUM_REASSEMBLY; i++)
		hdev->reassembly[i] = NULL;

	memset(&hdev->stat, 0, sizeof(struct hci_dev_stats));
	atomic_set(&hdev->promisc, 0);

	if (ghdev) {
		write_unlock(&hci_dev_lock);
		RTKBT_ERR("%s: Hci device has been registered already", __func__);
		return -1;
	} else
		ghdev = hdev;

	write_unlock(&hci_dev_lock);

	return id;
}

/* Unregister HCI device */
static void hci_unregister_dev(struct hci_dev *hdev)
{
	int i;

	RTKBT_DBG("%s: hdev %p name %s bus %d", __func__, hdev, hdev->name, hdev->bus);
	set_bit(HCI_UNREGISTER, &hdev->flags);

	write_lock(&hci_dev_lock);
	ghdev = NULL;
	write_unlock(&hci_dev_lock);

	hci_dev_do_close(hdev);
	for (i = 0; i < NUM_REASSEMBLY; i++)
		kfree_skb(hdev->reassembly[i]);
}


#ifdef CONFIG_SCO_OVER_HCI
/* copy data from the URB buffer into the ALSA ring buffer */
static bool rtk_copy_capture_data_to_alsa(struct btusb_data *data, uint8_t *p_data, unsigned int frames)
{
	struct snd_pcm_runtime *runtime;
	unsigned int frame_bytes, frames1;
	u8 *dest;
	RTK_sco_card_t  *pSCOSnd = data->pSCOSnd;

	runtime = pSCOSnd->capture.substream->runtime;
	frame_bytes = 2;

	dest = runtime->dma_area + pSCOSnd->capture.buffer_pos * frame_bytes;
	if (pSCOSnd->capture.buffer_pos + frames <= runtime->buffer_size) {
		  memcpy(dest, p_data, frames * frame_bytes);
	} else {
		/* wrap around at end of ring buffer */
		frames1 = runtime->buffer_size - pSCOSnd->capture.buffer_pos;
		memcpy(dest, p_data, frames1 * frame_bytes);
		memcpy(runtime->dma_area,
				p_data + frames1 * frame_bytes,
				(frames - frames1) * frame_bytes);
	}

	pSCOSnd->capture.buffer_pos += frames;
	if (pSCOSnd->capture.buffer_pos >= runtime->buffer_size) {
		pSCOSnd->capture.buffer_pos -= runtime->buffer_size;
	}

	if ((pSCOSnd->capture.buffer_pos%runtime->period_size) == 0) {
		snd_pcm_period_elapsed(pSCOSnd->capture.substream);
	}

	return false;
}

static void hci_send_to_alsa_ringbuffer(struct hci_dev *hdev, struct sk_buff *skb)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	RTK_sco_card_t  *pSCOSnd = data->pSCOSnd;
	uint8_t *p_data;
	int sco_length = skb->len - HCI_SCO_HDR_SIZE;

	RTKBT_DBG("%s", __func__);

	if (!hdev) {
		RTKBT_ERR("%s: Frame for unknown HCI device", __func__);
		return;
	}

	if (!test_bit(ALSA_CAPTURE_RUNNING, &pSCOSnd->states)) {
		//RTKBT_WARN("%s: ALSA is not running", __func__);
		return;
	}

	p_data = (uint8_t *)skb->data + HCI_SCO_HDR_SIZE;
	rtk_copy_capture_data_to_alsa(data, p_data, sco_length/2);
}
#endif

static void hci_send_to_stack(struct hci_dev *hdev, struct sk_buff *skb)
{
	struct sk_buff *rtk_skb_copy = NULL;

	RTKBT_DBG("%s", __func__);

	if (!hdev) {
		RTKBT_ERR("%s: Frame for unknown HCI device", __func__);
		return;
	}

	if (!test_bit(HCI_RUNNING, &hdev->flags)) {
		RTKBT_ERR("%s: HCI not running", __func__);
		return;
	}

	rtk_skb_copy = pskb_copy(skb, GFP_ATOMIC);
	if (!rtk_skb_copy) {
		RTKBT_ERR("%s: Copy skb error", __func__);
		return;
	}

	memcpy(skb_push(rtk_skb_copy, 1), &bt_cb(skb)->pkt_type, 1);
	rtk_enqueue(rtk_skb_copy);

	/* Make sure bt char device existing before wakeup read queue */
	hdev = hci_dev_get(0);
	if (hdev) {
		RTKBT_DBG("%s: Try to wakeup read queue", __func__);
		wake_up_interruptible(&btchr_read_wait);
	}

	return;
}

/* Receive frame from HCI drivers */
static int hci_recv_frame(struct sk_buff *skb)
{
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

	if (!hdev || !test_bit(HCI_UP, &hdev->flags)) {
		kfree_skb(skb);
		return -ENXIO;
	}

	/* Incomming skb */
	bt_cb(skb)->incoming = 1;

	/* Time stamp */
	__net_timestamp(skb);

	if (atomic_read(&hdev->promisc)) {
#ifdef CONFIG_SCO_OVER_HCI
		if (bt_cb(skb)->pkt_type == HCI_SCODATA_PKT)
			hci_send_to_alsa_ringbuffer(hdev, skb);
#endif
		/* Send copy to the sockets */
		hci_send_to_stack(hdev, skb);
	}

	kfree_skb(skb);
	return 0;
}

/* Receive frame from HCI drivers */
static int hci_recv_sco_frame(struct sk_buff *skb)
{
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

	if (!hdev || !test_bit(HCI_UP, &hdev->flags)) {
		kfree_skb(skb);
		return -ENXIO;
	}

	/* Incomming skb */
	bt_cb(skb)->incoming = 1;

	/* Time stamp */
	__net_timestamp(skb);

	if (atomic_read(&hdev->promisc)) {
#ifdef CONFIG_SCO_OVER_HCI
		if (bt_cb(skb)->pkt_type == HCI_SCODATA_PKT)
			hci_send_to_alsa_ringbuffer(hdev, skb);
#endif
		/* Send copy to the sockets */
		hci_send_to_stack(hdev, skb);
	}

	kfree_skb(skb);
	return 0;
}

static int hci_reassembly(struct hci_dev *hdev, int type, void *data,
						  int count, __u8 index)
{
	int len = 0;
	int hlen = 0;
	int remain = count;
	struct sk_buff *skb;
	struct bt_skb_cb *scb;

	RTKBT_DBG("%s", __func__);

	if ((type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT) ||
			index >= NUM_REASSEMBLY)
		return -EILSEQ;

	skb = hdev->reassembly[index];

	if (!skb) {
		switch (type) {
		case HCI_ACLDATA_PKT:
			len = HCI_MAX_FRAME_SIZE;
			hlen = HCI_ACL_HDR_SIZE;
			break;
		case HCI_EVENT_PKT:
			len = HCI_MAX_EVENT_SIZE;
			hlen = HCI_EVENT_HDR_SIZE;
			break;
		case HCI_SCODATA_PKT:
			len = HCI_MAX_SCO_SIZE;
			hlen = HCI_SCO_HDR_SIZE;
			break;
		}

		skb = bt_skb_alloc(len, GFP_ATOMIC);
		if (!skb)
			return -ENOMEM;

		scb = (void *) skb->cb;
		scb->expect = hlen;
		scb->pkt_type = type;

		skb->dev = (void *) hdev;
		hdev->reassembly[index] = skb;

	}

	while (count) {
		scb = (void *) skb->cb;
		len = min_t(uint, scb->expect, count);

		memcpy(skb_put(skb, len), data, len);

		count -= len;
		data += len;
		scb->expect -= len;
		remain = count;

		switch (type) {
		case HCI_EVENT_PKT:
			if (skb->len == HCI_EVENT_HDR_SIZE) {
				struct hci_event_hdr *h = hci_event_hdr(skb);
				scb->expect = h->plen;

				if (skb_tailroom(skb) < scb->expect) {
					kfree_skb(skb);
					hdev->reassembly[index] = NULL;
					return -ENOMEM;
				}
			}
			break;

		case HCI_ACLDATA_PKT:
			if (skb->len  == HCI_ACL_HDR_SIZE) {
				struct hci_acl_hdr *h = hci_acl_hdr(skb);
				scb->expect = __le16_to_cpu(h->dlen);

				if (skb_tailroom(skb) < scb->expect) {
					kfree_skb(skb);
					hdev->reassembly[index] = NULL;
					return -ENOMEM;
				}
			}
			break;

		case HCI_SCODATA_PKT:
			if (skb->len == HCI_SCO_HDR_SIZE) {
				struct hci_sco_hdr *h = hci_sco_hdr(skb);
				scb->expect = h->dlen;

				if (skb_tailroom(skb) < scb->expect) {
					kfree_skb(skb);
					hdev->reassembly[index] = NULL;
					return -ENOMEM;
				}
			}
			break;
		}

		if (scb->expect == 0) {
			/* Complete frame */
			if (HCI_ACLDATA_PKT == type)
				print_acl(skb, 0);
			if (HCI_SCODATA_PKT == type)
				print_sco(skb, 0);
			if (HCI_EVENT_PKT == type)
				print_event(skb);

			bt_cb(skb)->pkt_type = type;
			if (type == HCI_SCODATA_PKT) {
				hci_recv_sco_frame(skb);
			} else
				hci_recv_frame(skb);

			hdev->reassembly[index] = NULL;
			return remain;
		}
	}

	return remain;
}

static int hci_recv_fragment(struct hci_dev *hdev, int type, void *data, int count)
{
	int rem = 0;

	if (type < HCI_ACLDATA_PKT || type > HCI_EVENT_PKT)
		return -EILSEQ;

	while (count) {
		rem = hci_reassembly(hdev, type, data, count, type - 1);
		if (rem < 0)
			return rem;

		data += (count - rem);
		count = rem;
	}

	return rem;
}

void hci_hardware_error(void)
{
	struct sk_buff *rtk_skb_copy = NULL;
	int len = 4;
	uint8_t hardware_err_pkt[4] = {HCI_EVENT_PKT, 0x10, 0x01, HCI_VENDOR_USB_DISC_HARDWARE_ERROR};

	rtk_skb_copy = alloc_skb(len, GFP_ATOMIC);
	if (!rtk_skb_copy) {
		RTKBT_ERR("%s: Failed to allocate mem", __func__);
		return;
	}

	memcpy(skb_put(rtk_skb_copy, len), hardware_err_pkt, len);
	rtk_enqueue(rtk_skb_copy);

	wake_up_interruptible(&btchr_read_wait);
}

static int btchr_open(struct inode *inode_p, struct file  *file_p)
{
	struct btusb_data *data;
	struct hci_dev *hdev;
	struct sk_buff *skb;
	int i;

	RTKBT_INFO("%s: BT usb char device is opening", __func__);

	if (!check_set_driver_state_value(DEVICE_PROBED, CHAR_OPENED)) {
		RTKBT_ERR("%s: Device not probed", __func__);
		return -ENODEV;
	}


	hdev = hci_dev_get(0);
	if (!hdev) {
		RTKBT_ERR("%s: Failed to get hci dev[NULL]", __func__);
		return -ENODEV;
	}

	set_bit(HCI_UP, &hdev->flags);
	data = GET_DRV_DATA(hdev);

	atomic_inc(&hdev->promisc);
	/*
	 * As bt device is not re-opened when hotplugged out, we cannot
	 * trust on file's private data(may be null) when other file ops
	 * are invoked.
	 */
	file_p->private_data = data;

	hci_dev_open(0);
	rtk_clear_queue();
	for (i = 0; i < NUM_REASSEMBLY; i++) {
		skb = hdev->reassembly[i];
		if (skb) {
			hdev->reassembly[i] = NULL;
			kfree_skb(skb);
		}
	}
	return nonseekable_open(inode_p, file_p);
}

static int btchr_close(struct inode  *inode_p, struct file   *file_p)
{
	struct btusb_data *data;
	struct hci_dev *hdev;

	RTKBT_INFO("%s: BT usb char device is closing", __func__);

	data = file_p->private_data;
	file_p->private_data = NULL;

#if CONFIG_BLUEDROID
	/*
	 * If the upper layer closes bt char interfaces, no reset
	 * action required even bt device hotplugged out.
	 */
	bt_reset = 0;
#endif


	hdev = hci_dev_get(0);
	if (hdev) {
		atomic_set(&hdev->promisc, 0);
		hci_dev_close(0);
		clear_bit(HCI_UP, &hdev->flags);
	}

	clear_driver_state(CHAR_OPENED);
	//if the state is not probed, the driver may be in the disconnecting state
	//and waitting for signal to wake up
	if ((get_driver_state_value() & DEVICE_PROBED) == 0)
		wake_up_interruptible(&bt_drv_state_wait);
	return 0;
}

static ssize_t btchr_read(struct file *file_p,
		char __user *buf_p,
		size_t count,
		loff_t *pos_p)
{
	struct hci_dev *hdev;
	struct sk_buff *skb;
	// ssize_t ret = 0;
	int ret = 0;

	RTKBT_DBG("%s: BT usb char device is reading", __func__);

	while (count) {
		hdev = hci_dev_get(0);
		if (!hdev) {
			/*
			 * Note: Only when BT device hotplugged out, we wil get
			 * into such situation. In order to keep the upper layer
			 * stack alive (blocking the read), we should never return
			 * EFAULT or break the loop.
			 */
			RTKBT_ERR("%s: Failed to get hci dev[Null]", __func__);
		}

		ret = wait_event_interruptible(btchr_read_wait, !is_queue_empty());
		if (ret < 0) {
			RTKBT_ERR("%s: wait event is signaled %d", __func__, ret);
			break;
		}

		skb = rtk_dequeue_try(count);
		if (skb) {
			ret = usb_put_user(skb, buf_p, count);
			if (ret < 0)
				RTKBT_ERR("%s: Failed to put data to user space", __func__);
			kfree_skb(skb);
			break;
		}
	}

	return ret;
}

static ssize_t btchr_write(struct file *file_p,
		const char __user *buf_p,
		size_t count,
		loff_t *pos_p)
{
	struct btusb_data *data = file_p->private_data;
	struct hci_dev *hdev;
	struct sk_buff *skb;

	RTKBT_DBG("%s: BT usb char device is writing", __func__);

	if ((get_driver_state_value() & DEVICE_PROBED) == 0) {
		RTKBT_ERR("%s: Device not probed", __func__);
		return POLLERR | POLLHUP;
	}

	hdev = hci_dev_get(0);
	if (!hdev) {
		RTKBT_WARN("%s: Failed to get hci dev[Null]", __func__);
		/*
		 * Note: we bypass the data from the upper layer if bt device
		 * is hotplugged out. Fortunatelly, H4 or H5 HCI stack does
		 * NOT check btchr_write's return value. However, returning
		 * count instead of EFAULT is preferable.
		 */
		/* return -EFAULT; */
		return count;
	}

	/* Never trust on btusb_data, as bt device may be hotplugged out */
	data = GET_DRV_DATA(hdev);
	if (!data) {
		RTKBT_WARN("%s: Failed to get bt usb driver data[Null]", __func__);
		return count;
	}

	if (count > HCI_MAX_FRAME_SIZE)
		return -EINVAL;

	skb = bt_skb_alloc(count, GFP_ATOMIC);
	if (!skb)
		return -ENOMEM;
	skb_reserve(skb, -1); // Add this line

	if (copy_from_user(skb_put(skb, count), buf_p, count)) {
		RTKBT_ERR("%s: Failed to get data from user space", __func__);
		kfree_skb(skb);
		return -EFAULT;
	}

	skb->dev = (void *)hdev;
	bt_cb(skb)->pkt_type = *((__u8 *)skb->data);
	skb_pull(skb, 1);
	data->hdev->send(skb);

	return count;
}

static unsigned int btchr_poll(struct file *file_p, poll_table *wait)
{
	struct btusb_data *data = file_p->private_data;
	struct hci_dev *hdev;

	RTKBT_DBG("%s: BT usb char device is polling", __func__);

	if ((get_driver_state_value() & DRIVER_ON) == 0 ||
		  (get_driver_state_value() & DEVICE_PROBED) == 0) {
		RTKBT_ERR("%s: Device not probed", __func__);
		return POLLERR | POLLHUP;
	}

	poll_wait(file_p, &btchr_read_wait, wait);

	hdev = hci_dev_get(0);
	if (!hdev) {
		RTKBT_ERR("%s: Failed to get hci dev[Null]", __func__);
		mdelay(URB_CANCELING_DELAY_MS);
		return POLLOUT | POLLWRNORM;
	}

	/* Never trust on btusb_data, as bt device may be hotplugged out */
	data = GET_DRV_DATA(hdev);
	if (!data) {
		/*
		 * When bt device is hotplugged out, btusb_data will
		 * be freed in disconnect.
		 */
		RTKBT_ERR("%s: Failed to get bt usb driver data[Null]", __func__);
		mdelay(URB_CANCELING_DELAY_MS);
		return POLLOUT | POLLWRNORM;
	}

	if (!is_queue_empty())
		return POLLIN | POLLRDNORM;

	return POLLOUT | POLLWRNORM;
}

static long btchr_ioctl(struct file *file_p, unsigned int cmd, unsigned long arg)
{
	int ret = 0;
	struct hci_dev *hdev;
	struct btusb_data *data;
	firmware_info *fw_info;

	if ((get_driver_state_value() & DRIVER_ON) == 0 ||
		  (get_driver_state_value() & DEVICE_PROBED) == 0) {
		RTKBT_ERR("%s bt controller is disconnect!", __func__);
		return -ENODEV;
	}

	hdev = hci_dev_get(0);
	if (!hdev) {
		RTKBT_ERR("%s device is NULL!", __func__);
		return 0;
	}
	data = GET_DRV_DATA(hdev);
	fw_info = data->fw_info;

	RTKBT_INFO(" btchr_ioctl with Cmd:%d", cmd);
	switch (cmd) {
	case DOWN_FW_CFG:
		ret = usb_autopm_get_interface(data->intf);
		if (ret < 0) {
			goto failed;
		}

		ret = download_patch(fw_info, 1);
		usb_autopm_put_interface(data->intf);
		if (ret < 0) {
			RTKBT_ERR("%s:Failed in download_patch with ret:%d", __func__, ret);
			goto failed;
		}

		ret = hdev->open(hdev);
		if (ret < 0) {
			RTKBT_ERR("%s:Failed in hdev->open(hdev):%d", __func__, ret);
			goto failed;
		}
		ret = 1;
		break;

#ifdef CONFIG_SCO_OVER_HCI
	case SET_ISO_CFG:
		if (get_user(hdev->voice_setting, (__u16 __user *)arg)) {
			ret = -EFAULT;
		}
		RTKBT_INFO(" voice settings = 0x%04x", hdev->voice_setting);
		break;
#endif

	case GET_USB_INFO:
		ret = hdev->open(hdev);
		if (ret < 0) {
			RTKBT_ERR("%s:Failed in hdev->open(hdev):%d", __func__, ret);
			//goto done;
		}
		put_user(usb_info, (__u32 __user *)arg);
		ret = 1;
		break;

	case RESET_CONTROLLER:
		reset_controller(fw_info);
		ret = 1;
		break;

	case DWFW_CMPLT:
		{
			uint16_t lmp_sub = 0;
			if (get_user(lmp_sub, (__u16 __user *)arg)) {
				ret = -EFAULT;
			} else if (lmp_sub != 0) {
				fw_info->patch_entry->lmp_sub = lmp_sub;
			}
			RTKBT_INFO("%s lmp_sub = 0x%x, patch_entry->lmp_sub = 0x%x", __func__,
						  lmp_sub, fw_info->patch_entry->lmp_sub);
		}
		break;

	default:
		RTKBT_ERR("%s:Failed with wrong Cmd:%d", __func__, cmd);
		goto failed;
	}

failed:
	return ret;
}

#ifdef CONFIG_COMPAT
static long compat_btchr_ioctl (struct file *filp, unsigned int cmd, unsigned long arg)
{
	return btchr_ioctl(filp, cmd, (unsigned long) compat_ptr(arg));
}
#endif

static struct file_operations bt_chrdev_ops  = {
	open:     btchr_open,
	release : btchr_close,
	read    : btchr_read,
	write   : btchr_write,
	poll    : btchr_poll,
	unlocked_ioctl : btchr_ioctl,
#ifdef CONFIG_COMPAT
	compat_ioctl   : compat_btchr_ioctl,
#endif
};

static int btchr_init(void)
{
	int res = 0;
	struct device *dev;

	RTKBT_INFO("Register usb char device interface for BT driver");
	skb_queue_head_init(&btchr_readq);
	init_waitqueue_head(&btchr_read_wait);
	init_waitqueue_head(&bt_drv_state_wait);

	bt_char_class = class_create(THIS_MODULE, BT_CHAR_DEVICE_NAME);
	if (IS_ERR(bt_char_class)) {
		RTKBT_ERR("Failed to create bt char class");
		return PTR_ERR(bt_char_class);
	}

	res = alloc_chrdev_region(&bt_devid, 0, 1, BT_CHAR_DEVICE_NAME);
	if (res < 0) {
		RTKBT_ERR("Failed to allocate bt char device");
		goto err_alloc;
	}

	dev = device_create(bt_char_class, NULL, bt_devid, NULL, BT_CHAR_DEVICE_NAME);
	if (IS_ERR(dev)) {
		RTKBT_ERR("Failed to create bt char device");
		res = PTR_ERR(dev);
		goto err_create;
	}

	cdev_init(&bt_char_dev, &bt_chrdev_ops);
	res = cdev_add(&bt_char_dev, bt_devid, 1);
	if (res < 0) {
		RTKBT_ERR("Failed to add bt char device");
		goto err_add;
	}

	return 0;

err_add:
	device_destroy(bt_char_class, bt_devid);
err_create:
	unregister_chrdev_region(bt_devid, 1);
err_alloc:
	class_destroy(bt_char_class);
	return res;
}

static void btchr_exit(void)
{
	RTKBT_INFO("Unregister usb char device interface for BT driver");

	device_destroy(bt_char_class, bt_devid);
	cdev_del(&bt_char_dev);
	unregister_chrdev_region(bt_devid, 1);
	class_destroy(bt_char_class);

	return;
}
#endif

int send_hci_cmd(firmware_info *fw_info)
{
	int i = 0;
	int ret_val = -1;
	while ((ret_val < 0) && (i++ < 10)) {
		ret_val = usb_control_msg(
				fw_info->udev, fw_info->pipe_out,
				0, USB_TYPE_CLASS, 0, 0,
				(void *)(fw_info->send_pkt),
				fw_info->pkt_len, MSG_TO);
	}
	return ret_val;
}

int rcv_hci_evt(firmware_info *fw_info)
{
	int ret_len = 0, ret_val = 0;
	int i;

	while (1) {
		for (i = 0; i < 5; i++) {
			ret_val = usb_interrupt_msg(
					fw_info->udev, fw_info->pipe_in,
					(void *)(fw_info->rcv_pkt), PKT_LEN,
					&ret_len, MSG_TO);
			if (ret_val >= 0)
				break;
		}

		if (ret_val < 0)
			return ret_val;

		if (CMD_CMP_EVT == fw_info->evt_hdr->evt) {
			if (fw_info->cmd_hdr->opcode == fw_info->cmd_cmp->opcode)
				return ret_len;
		}
	}
}

int set_bt_onoff(firmware_info *fw_info, uint8_t onoff)
{
	patch_info *patch_entry;
	int ret_val;

	RTKBT_INFO("%s: %s", __func__, onoff != 0 ? "on" : "off");

	patch_entry = fw_info->patch_entry;
	if (!patch_entry)
		return -1;

	fw_info->cmd_hdr->opcode = cpu_to_le16(BTOFF_OPCODE);
	fw_info->cmd_hdr->plen = 1;
	fw_info->pkt_len = CMD_HDR_LEN + 1;
	fw_info->send_pkt[CMD_HDR_LEN] = onoff;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send bt %s cmd, errno %d",
				__func__, onoff != 0 ? "on" : "off", ret_val);
		return ret_val;
	}

	ret_val = rcv_hci_evt(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to receive bt %s event, errno %d",
				__func__, onoff != 0 ? "on" : "off", ret_val);
		return ret_val;
	}

	return ret_val;
}

static patch_info *get_fw_table_entry(struct usb_device *udev)
{
	patch_info *patch_entry = fw_patch_table;
	uint16_t vid = le16_to_cpu(udev->descriptor.idVendor);
	uint16_t pid = le16_to_cpu(udev->descriptor.idProduct);
	uint32_t entry_size = sizeof(fw_patch_table) / sizeof(fw_patch_table[0]);
	uint32_t i;

	RTKBT_INFO("%s: Product id = 0x%04x, fw table entry size %d", __func__, pid, entry_size);
	usb_info = (uint32_t)(vid<<16) | pid;

	for (i = 0; i < entry_size; i++, patch_entry++) {
		if ((vid == patch_entry->vid) && (pid == patch_entry->pid))
			break;
	}

	if (i == entry_size) {
		RTKBT_ERR("%s: No fw table entry found", __func__);
		return NULL;
	}

	return patch_entry;
}

#if SUSPNED_DW_FW
static patch_info *get_suspend_fw_table_entry(struct usb_device *udev)
{
	patch_info *patch_entry = fw_patch_table;
	patch_info *patch_entry_real = NULL;
	uint16_t vid = le16_to_cpu(udev->descriptor.idVendor);
	uint16_t pid = le16_to_cpu(udev->descriptor.idProduct);
	uint32_t entry_size = sizeof(fw_patch_table) / sizeof(fw_patch_table[0]);
	uint32_t i;

	RTKBT_INFO("%s: Product id = 0x%04x, fw table entry size %d", __func__, pid, entry_size);

	for (i = 0; i < entry_size; i++, patch_entry++) {
		if ((vid == patch_entry->vid) && (pid == patch_entry->pid))
			break;
	}

	if (i == entry_size) {
		RTKBT_ERR("%s: No fw table entry found", __func__);
		return NULL;
	}
	patch_entry_real = kmalloc(sizeof(fw_patch_table[0]), GFP_KERNEL);
	if (!patch_entry_real)
		return NULL;
	memcpy(patch_entry_real, patch_entry, sizeof(fw_patch_table[0]));
	return patch_entry_real;
}
#endif

static struct rtk_epatch_entry *get_fw_patch_entry(struct rtk_epatch *epatch_info, uint16_t eco_ver)
{
	int patch_num = epatch_info->number_of_total_patch;
	uint8_t *epatch_buf = (uint8_t *)epatch_info;
	struct rtk_epatch_entry *p_entry = NULL;
	int coex_date;
	int coex_ver;
	int i;

	for (i = 0; i < patch_num; i++) {
		if (*(uint16_t *)(epatch_buf + 14 + 2*i) == eco_ver + 1) {
			p_entry = kzalloc(sizeof(*p_entry), GFP_KERNEL);
			if (!p_entry) {
				RTKBT_ERR("%s: Failed to allocate mem for patch entry", __func__);
				return NULL;
			}
			p_entry->chip_id = eco_ver + 1;
			p_entry->patch_length = *(uint16_t *)(epatch_buf + 14 + 2*patch_num + 2*i);
			p_entry->start_offset = *(uint32_t *)(epatch_buf + 14 + 4*patch_num + 4*i);
			p_entry->coex_version = *(uint32_t *)(epatch_buf + p_entry->start_offset + p_entry->patch_length - 12);
			p_entry->svn_version  = *(uint32_t *)(epatch_buf + p_entry->start_offset + p_entry->patch_length - 8);
			p_entry->fw_version   = *(uint32_t *)(epatch_buf + p_entry->start_offset + p_entry->patch_length - 4);

			coex_date = ((p_entry->coex_version >> 16) & 0x7ff) + ((p_entry->coex_version >> 27) * 10000);
			coex_ver = p_entry->coex_version & 0xffff;

			RTKBT_INFO("BTCOEX:20%06d-0x%04x svn version:0x%08x fw version:0x%08x rtk_btusb version:%s Cut:%d, patch length:0x%04x, patch offset:0x%08x\n", \
					coex_date, coex_ver, p_entry->svn_version, p_entry->fw_version, VERSION, p_entry->chip_id, p_entry->patch_length, p_entry->start_offset);
			break;
		}
	}

	return p_entry;
}

/*reset_controller is aimed to reset_bt_fw before updata Fw patch*/
int reset_controller(firmware_info *fw_info)
{
	int ret_val;
	RTKBT_ERR("reset_controller");

	if (!fw_info)
		return -ENODEV;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_FORCE_RESET_AND_PATCHABLE);
	fw_info->cmd_hdr->plen = 0;
	fw_info->pkt_len = CMD_HDR_LEN;
	ret_val = send_hci_cmd(fw_info);

	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send hci cmd 0x%04x, errno %d",
				__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	//sleep 1s for firmware reset.
	msleep(1000);
	RTKBT_INFO("%s: Wait fw reset for 1000ms", __func__);

	return ret_val;
}
/*reset_controller is aimed to reset_bt_fw before updata Fw patch*/

/*
 * check the return value
 * 1: need to download fw patch
 * 0: no need to download fw patch
 * <0: failed to check lmp version
 */
int check_fw_version(firmware_info *fw_info, bool resume_check)
{
	struct hci_rp_read_local_version *read_ver_rsp;
	patch_info *patch_entry = NULL;
	int ret_val = -1, i, ret_len = 0;
	struct sk_buff *rtk_skb_copy = NULL;
	unsigned char pkt_type = HCI_EVENT_PKT;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_OP_READ_LOCAL_VERSION);
	fw_info->cmd_hdr->plen = 0;
	fw_info->pkt_len = CMD_HDR_LEN;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send hci cmd 0x%04x, errno %d",
				__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	while (1) {
		for (i = 0; i < 5; i++) {
		ret_val = usb_interrupt_msg(
			fw_info->udev, fw_info->pipe_in,
			(void *)(fw_info->rcv_pkt), PKT_LEN,
			&ret_len, MSG_TO);
			if (ret_val >= 0)
				break;
		}

		if (ret_val < 0) {
			RTKBT_ERR("%s: Failed to receive hci event, errno %d",
				__func__, ret_val);
			return ret_val;
		}

		if ((CMD_CMP_EVT == fw_info->evt_hdr->evt) &&
			(fw_info->cmd_hdr->opcode == fw_info->cmd_cmp->opcode)) {
				break;
		} else if (resume_check) {
			rtk_skb_copy = bt_skb_alloc((ret_len), GFP_ATOMIC);
			if (!rtk_skb_copy) {
				RTKBT_ERR("%s: Failed to allocate mem", __func__);
				return 2;
			}

			memcpy(skb_put(rtk_skb_copy, ret_len), fw_info->rcv_pkt, ret_len);
			memcpy(skb_push(rtk_skb_copy, 1), &pkt_type, 1);
			rtk_enqueue(rtk_skb_copy);

			rtk_skb_copy = NULL;
			wake_up_interruptible(&btchr_read_wait);
		}
	}

	patch_entry = fw_info->patch_entry;
	read_ver_rsp = (struct hci_rp_read_local_version *)(fw_info->rsp_para);

	RTKBT_INFO("%s: Controller lmp = 0x%04x, patch lmp = 0x%04x, default patch lmp = 0x%04x",
			__func__, read_ver_rsp->lmp_subver, patch_entry->lmp_sub, patch_entry->lmp_sub_default);

	if (read_ver_rsp->lmp_subver == patch_entry->lmp_sub_default) {
		RTKBT_INFO("%s: Cold BT controller startup", __func__);

		return 2;

	} else if (read_ver_rsp->lmp_subver != patch_entry->lmp_sub) {
		RTKBT_INFO("%s: Warm BT controller startup with updated lmp", __func__);
		return 1;
	} else {
		RTKBT_INFO("%s: Warm BT controller startup with same lmp", __func__);
		return 0;
	}
}

#if SET_WAKEUP_DEVICE
int set_wakeup_device(firmware_info *fw_info, uint8_t *wakeup_bdaddr)
{
	struct rtk_eversion_evt *ever_evt;
	int ret_val;

	if (!fw_info)
		return -ENODEV;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_ADD_WAKE_UP_DEVICE);
	fw_info->cmd_hdr->plen = 7;
	memcpy(fw_info->req_para, wakeup_bdaddr, 7);
	fw_info->pkt_len = CMD_HDR_LEN + 7;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send hci cmd 0x%04x, errno %d\n",
			__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	ret_val = rcv_hci_evt(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to receive hci event, errno %d\n", __func__, ret_val);
		return ret_val;
	}

	ever_evt = (struct rtk_eversion_evt *)(fw_info->rsp_para);

	RTKBT_DBG("%s: status %d, eversion %d", __func__, ever_evt->status, ever_evt->version);
	return ret_val;
}
#endif

/*reset_channel to recover the communication between wifi 8192eu with 8761 bt controller in case of geteversion error*/

int reset_channel(firmware_info *fw_info)
{
	struct rtk_reset_evt *ever_evt;
	int ret_val;

	if (!fw_info)
		return -ENODEV;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_RESET);
	fw_info->cmd_hdr->plen = 0;
	fw_info->pkt_len = CMD_HDR_LEN;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send  hci cmd 0x%04x, errno %d",
				__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	ret_val = rcv_hci_evt(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to receive  hci event, errno %d",
				__func__, ret_val);
		return ret_val;
	}

	ever_evt = (struct rtk_reset_evt *)(fw_info->rsp_para);

	RTKBT_INFO("%s: status %d ", __func__, ever_evt->status);

	//sleep 300ms for channel reset.
	msleep(300);
	RTKBT_INFO("%s: Wait channel reset for 300ms", __func__);

	return ret_val;
}


//sometimes the controller is in warm resume,and still send message to host
//we should reset controller and clean the hardware buffer
bool reset_and_clean_hw_buffer(firmware_info *fw_info)
{
	int ret_val;
	int ret_len = 0;
	bool event_recv = false;

	if (!fw_info)
		return -ENODEV;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_RESET);
	fw_info->cmd_hdr->plen = 0;
	fw_info->pkt_len = CMD_HDR_LEN;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send  hci cmd 0x%04x, errno %d",
				__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	//we need to clean the hardware buffer
	while (1) {
		ret_val = usb_interrupt_msg(
			fw_info->udev, fw_info->pipe_in,
			(void *)(fw_info->rcv_pkt), PKT_LEN,
			&ret_len, (MSG_TO/2));

		if (ret_val >= 0) {
			if (event_recv) {
				RTKBT_INFO("%s: clear hardware event", __func__);
				continue;
			}
		} else {
		  return event_recv;
		}

		if (CMD_CMP_EVT == fw_info->evt_hdr->evt) {
			if (fw_info->cmd_hdr->opcode == fw_info->cmd_cmp->opcode) {
			  event_recv = true;
			}
		}
	}
	return ret_val;
}

int read_localversion(firmware_info *fw_info)
{
	struct rtk_localversion_evt *ever_evt;
	int ret_val;

	if (!fw_info)
		return -ENODEV;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_READ_LMP_VERISION);
	fw_info->cmd_hdr->plen = 0;
	fw_info->pkt_len = CMD_HDR_LEN;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send  hci cmd 0x%04x, errno %d",
				__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	ret_val = rcv_hci_evt(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to receive  hci event, errno %d",
				__func__, ret_val);
		return ret_val;
	}

	ever_evt = (struct rtk_localversion_evt *)(fw_info->rsp_para);

	RTKBT_INFO("%s: status %d ", __func__, ever_evt->status);
	RTKBT_INFO("%s: hci_version %d ", __func__, ever_evt->hci_version);
	RTKBT_INFO("%s: hci_revision %d ", __func__, ever_evt->hci_revision);
	RTKBT_INFO("%s: lmp_version %d ", __func__, ever_evt->lmp_version);
	RTKBT_INFO("%s: lmp_subversion %d ", __func__, ever_evt->lmp_subversion);
	RTKBT_INFO("%s: lmp_manufacture %d ", __func__, ever_evt->lmp_manufacture);
	//sleep 300ms for channel reset.
	msleep(300);
	RTKBT_INFO("%s: Wait channel reset for 300ms", __func__);

	return ret_val;
}

int get_eversion(firmware_info *fw_info)
{
	struct rtk_eversion_evt *ever_evt;
	int ret_val;

	if (!fw_info)
		return -ENODEV;

	fw_info->cmd_hdr->opcode = cpu_to_le16(HCI_VENDOR_READ_RTK_ROM_VERISION);
	fw_info->cmd_hdr->plen = 0;
	fw_info->pkt_len = CMD_HDR_LEN;

	ret_val = send_hci_cmd(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to send hci cmd 0x%04x, errno %d",
				__func__, fw_info->cmd_hdr->opcode, ret_val);
		return ret_val;
	}

	ret_val = rcv_hci_evt(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to receive hci event, errno %d",
				__func__, ret_val);
		return ret_val;
	}

	ever_evt = (struct rtk_eversion_evt *)(fw_info->rsp_para);

	RTKBT_INFO("%s: status %d, eversion %d", __func__, ever_evt->status, ever_evt->version);

	if (ever_evt->status)
		fw_info->patch_entry->eversion = 0;
	else
		fw_info->patch_entry->eversion = ever_evt->version;

	return ret_val;
}

void rtk_update_altsettings(patch_info *patch_entry, const unsigned char *org_config_buf, int org_config_len, unsigned char **new_config_buf_ptr, int *new_config_len_ptr)
{
	static unsigned char config_buf[1024];
	unsigned short offset[256];
	unsigned char val[256];

	struct rtk_bt_vendor_config *config = (struct rtk_bt_vendor_config *)config_buf;
	struct rtk_bt_vendor_config_entry *entry = config->entry;

	int count = 0, temp = 0, i = 0, j;

	memset(config_buf, 0, sizeof(config_buf));
	memset(offset, 0, sizeof(offset));
	memset(val, 0, sizeof(val));

	memcpy(config_buf, org_config_buf, org_config_len);
	*new_config_buf_ptr = config_buf;
	*new_config_len_ptr = org_config_len;

	count = getAltSettings(patch_entry, offset, sizeof(offset)/sizeof(unsigned short));
	if (count <= 0) {
		RTKBT_INFO("rtk_update_altsettings: No AltSettings");
		return;
	} else {
		RTKBT_INFO("rtk_update_altsettings: %d AltSettings", count);
	}

	RTKBT_INFO("ORG Config len=%08x:\n", org_config_len);
	for (i = 0; i <= org_config_len; i += 0x10) {
		RTKBT_INFO("%08x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", i, \
			config_buf[i], config_buf[i+1], config_buf[i+2], config_buf[i+3], config_buf[i+4], config_buf[i+5], config_buf[i+6], config_buf[i+7], \
			config_buf[i+8], config_buf[i+9], config_buf[i+10], config_buf[i+11], config_buf[i+12], config_buf[i+13], config_buf[i+14], config_buf[i+15]);
	}

	if (config->data_len != org_config_len - sizeof(struct rtk_bt_vendor_config)) {
		RTKBT_ERR("rtk_update_altsettings: config len(%x) is not right(%zd)", config->data_len, org_config_len-sizeof(struct rtk_bt_vendor_config));
		return;
	}

	for (i = 0; i < config->data_len;) {
		for (j = 0; j < count; j++) {
			if (entry->offset == offset[j])
				offset[j] = 0;
		}

		if (getAltSettingVal(patch_entry, entry->offset, val) == entry->entry_len) {
			RTKBT_INFO("rtk_update_altsettings: replace %04x[%02x]", entry->offset, entry->entry_len);
			memcpy(entry->entry_data, val, entry->entry_len);
		}

		temp = entry->entry_len + sizeof(struct rtk_bt_vendor_config_entry);
		i += temp;
		entry = (struct rtk_bt_vendor_config_entry *)((uint8_t *)entry + temp);
	}

	for (j = 0; j < count; j++) {
		if (offset[j] == 0)
			continue;
		entry->entry_len = getAltSettingVal(patch_entry, offset[j], val);
		if (entry->entry_len <= 0)
			continue;
		entry->offset = offset[j];
		memcpy(entry->entry_data, val, entry->entry_len);
		RTKBT_INFO("rtk_update_altsettings: add %04x[%02x]", entry->offset, entry->entry_len);
		temp = entry->entry_len + sizeof(struct rtk_bt_vendor_config_entry);
		i += temp;
		entry = (struct rtk_bt_vendor_config_entry *)((uint8_t *)entry + temp);
	}
	config->data_len = i;
	*new_config_buf_ptr = config_buf;
	*new_config_len_ptr = config->data_len+sizeof(struct rtk_bt_vendor_config);

	return;
}

int load_firmware(firmware_info *fw_info, uint8_t **buff)
{
	const struct firmware *fw, *cfg;
	struct usb_device *udev;
	patch_info *patch_entry;
	char *config_name, *fw_name;
	int fw_len = 0;
	int ret_val;

	int config_len = 0, buf_len = -1;
	uint8_t *buf = *buff, *config_file_buf = NULL;
	uint8_t *epatch_buf = NULL;

	struct rtk_epatch *epatch_info = NULL;
	uint8_t need_download_fw = 1;
	struct rtk_extension_entry patch_lmp = {0};
	struct rtk_epatch_entry *p_epatch_entry = NULL;
	uint16_t lmp_version;
	//uint8_t use_mp_fw = 0;
	RTKBT_DBG("%s: start", __func__);

	udev = fw_info->udev;
	patch_entry = fw_info->patch_entry;
	lmp_version = patch_entry->lmp_sub_default;
	config_name = patch_entry->config_name;
	/* 1 Mptool Fw; 0 Normal Fw */
	if (DRV_MP_MODE == mp_drv_mode) {
		fw_name = patch_entry->mp_patch_name;
	} else {
		fw_name = patch_entry->patch_name;
	}

	RTKBT_INFO("%s: Default lmp version = 0x%04x, config file name[%s], "
			"fw file name[%s]", __func__, lmp_version, config_name, fw_name);

	ret_val = request_firmware(&cfg, config_name, &udev->dev);
	if (ret_val < 0)
		config_len = 0;
	else {
		int i;
		rtk_update_altsettings(patch_entry, cfg->data, cfg->size, &config_file_buf, &config_len);

		RTKBT_INFO("Final Config len=%08x:\n", config_len);
		for (i = 0; i <= config_len; i += 0x10) {
			RTKBT_INFO("%08x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", i, \
				config_file_buf[i], config_file_buf[i+1], config_file_buf[i+2], config_file_buf[i+3], config_file_buf[i+4], config_file_buf[i+5], config_file_buf[i+6], config_file_buf[i+7], \
				config_file_buf[i+8], config_file_buf[i+9], config_file_buf[i+10], config_file_buf[i+11], config_file_buf[i+12], config_file_buf[i+13], config_file_buf[i+14], config_file_buf[i+15]);
		}

		release_firmware(cfg);
	}

	ret_val = request_firmware(&fw, fw_name, &udev->dev);
	if (ret_val < 0)
		goto fw_fail;
	else {
		epatch_buf = vmalloc(fw->size);
		RTKBT_INFO("%s: epatch_buf = vmalloc(fw->size, GFP_KERNEL)", __func__);
		if (!epatch_buf) {
			release_firmware(fw);
			goto fw_fail;
		}
		memcpy(epatch_buf, fw->data, fw->size);
		fw_len = fw->size;
		buf_len = fw_len + config_len;
		release_firmware(fw);
	}

	if (lmp_version == ROM_LMP_8723a) {
		RTKBT_DBG("%s: 8723a -> use old style patch", __func__);
		if (!memcmp(epatch_buf, RTK_EPATCH_SIGNATURE, 8)) {
			RTKBT_ERR("%s: 8723a check signature error", __func__);
			need_download_fw = 0;
		} else {
			buf = kzalloc(buf_len, GFP_KERNEL);
			if (!buf) {
				RTKBT_ERR("%s: Failed to allocate mem for fw&config", __func__);
				buf_len = -1;
			} else {
				RTKBT_DBG("%s: 8723a -> fw copy directly", __func__);
				memcpy(buf, epatch_buf, buf_len);
				patch_entry->lmp_sub = *(uint16_t *)(buf + buf_len - config_len - 4);
				RTKBT_DBG("%s: Config lmp version = 0x%04x", __func__,
						patch_entry->lmp_sub);
				vfree(epatch_buf);
				RTKBT_INFO("%s:ROM_LMP_8723a vfree(epatch_buf)", __func__);
				epatch_buf = NULL;
				if (config_len)
					memcpy(buf + buf_len - config_len, config_file_buf, config_len);
			}
		}
	} else {
		RTKBT_DBG("%s: Not 8723a -> use new style patch", __func__);

		RTKBT_DBG("%s: reset_channel before get_eversion from bt controller", __func__);
		ret_val = reset_channel(fw_info);
		if (ret_val < 0) {
			RTKBT_ERR("%s: Failed to reset_channel, errno %d", __func__, ret_val);
			goto fw_fail;
		}
//		read_localversion(fw_info);
		RTKBT_DBG("%s: get_eversion from bt controller", __func__);

		ret_val = get_eversion(fw_info);
		if (ret_val < 0) {
			RTKBT_ERR("%s: Failed to get eversion, errno %d", __func__, ret_val);
			goto fw_fail;
		}

		RTKBT_DBG("%s: Get eversion =%d", __func__, patch_entry->eversion);
		if (memcmp(epatch_buf + buf_len - config_len - 4, EXTENSION_SECTION_SIGNATURE, 4)) {
			RTKBT_ERR("%s: Failed to check extension section signature", __func__);
			need_download_fw = 0;
		} else {
			uint8_t *temp;
			temp = epatch_buf+buf_len-config_len - 5;
			do {
				if (*temp == 0x00) {
					patch_lmp.opcode = *temp;
					patch_lmp.length = *(temp-1);
					patch_lmp.data = kzalloc(patch_lmp.length, GFP_KERNEL);
					if (patch_lmp.data) {
						int k;
						for (k = 0; k < patch_lmp.length; k++) {
							*(patch_lmp.data+k) = *(temp-2-k);
							RTKBT_DBG("data = 0x%x", *(patch_lmp.data+k));
						}
					}
					RTKBT_DBG("%s: opcode = 0x%x, length = 0x%x, data = 0x%x", __func__,
							patch_lmp.opcode, patch_lmp.length, *(patch_lmp.data));
					break;
				}
				temp -= *(temp-1) + 2;
			} while (*temp != 0xFF);

			if (lmp_version != project_id[*(patch_lmp.data)]) {
				RTKBT_ERR("%s: Default lmp_version 0x%04x, project_id[%d] 0x%04x "
						"-> not match", __func__, lmp_version, *(patch_lmp.data), project_id[*(patch_lmp.data)]);
				if (patch_lmp.data)
					kfree(patch_lmp.data);
				need_download_fw = 0;
			} else {
				RTKBT_INFO("%s: Default lmp_version 0x%04x, project_id[%d] 0x%04x "
						"-> match", __func__, lmp_version, *(patch_lmp.data), project_id[*(patch_lmp.data)]);
				if (patch_lmp.data)
					kfree(patch_lmp.data);
				if (memcmp(epatch_buf, RTK_EPATCH_SIGNATURE, 8)) {
					RTKBT_ERR("%s: Check signature error", __func__);
					need_download_fw = 0;
				} else {
					epatch_info = (struct rtk_epatch *)epatch_buf;
					patch_entry->lmp_sub = (uint16_t)epatch_info->fw_version;

					RTKBT_DBG("%s: lmp version 0x%04x, fw_version 0x%x, "
							"number_of_total_patch %d", __func__,
							patch_entry->lmp_sub, epatch_info->fw_version,
							epatch_info->number_of_total_patch);

					/* Get right epatch entry */
					p_epatch_entry = get_fw_patch_entry(epatch_info, patch_entry->eversion);
					if (p_epatch_entry == NULL) {
						RTKBT_WARN("%s: Failed to get fw patch entry", __func__);
						ret_val = -1;
						goto fw_fail ;
					}

					buf_len = p_epatch_entry->patch_length + config_len;
					RTKBT_DBG("buf_len = 0x%x", buf_len);

					buf = kzalloc(buf_len, GFP_KERNEL);
					if (!buf) {
						RTKBT_ERR("%s: Can't alloc memory for  fw&config", __func__);
						buf_len = -1;
						kfree(p_epatch_entry);
					} else {
						memcpy(buf, &epatch_buf[p_epatch_entry->start_offset], p_epatch_entry->patch_length);
						memcpy(&buf[p_epatch_entry->patch_length-4], &epatch_info->fw_version, 4);
						kfree(p_epatch_entry);
					}
					vfree(epatch_buf);
					RTKBT_INFO("%s: vfree(epatch_buf)", __func__);
					epatch_buf = NULL;

					if (config_len)
						memcpy(&buf[buf_len - config_len], config_file_buf, config_len);
				}
			}
		}
	}

	RTKBT_INFO("%s: fw%s exists, config file%s exists", __func__,
			(buf_len > 0) ? "" : " not", (config_len > 0) ? "":" not");

	if (buf && buf_len > 0 && need_download_fw)
		*buff = buf;

	RTKBT_DBG("%s: done", __func__);

	return buf_len;

fw_fail:
	return ret_val;
}

void load_firmware_info(firmware_info *fw_info)
{
	const struct firmware *fw;
	struct usb_device *udev;
	patch_info *patch_entry;
	char *fw_name;
	int ret_val;

	int buf_len = -1;
	uint8_t *epatch_buf = NULL;

	struct rtk_epatch *epatch_info = NULL;
	struct rtk_extension_entry patch_lmp = {0};
	uint16_t lmp_version;
	RTKBT_DBG("%s: start", __func__);

	udev = fw_info->udev;
	patch_entry = fw_info->patch_entry;
	lmp_version = patch_entry->lmp_sub_default;

	if (DRV_MP_MODE == mp_drv_mode) {
		fw_name = patch_entry->mp_patch_name;
	} else {
		fw_name = patch_entry->patch_name;
	}

	RTKBT_INFO("%s: Default lmp version = 0x%04x, fw file name[%s]", __func__, lmp_version, fw_name);

	ret_val = request_firmware(&fw, fw_name, &udev->dev);
	if (ret_val < 0)
		goto fw_fail;
	else {
		epatch_buf = vmalloc(fw->size);
		RTKBT_INFO("%s: epatch_buf = vmalloc(fw->size, GFP_KERNEL)", __func__);
		if (!epatch_buf) {
			release_firmware(fw);
			goto fw_fail;
		}
		memcpy(epatch_buf, fw->data, fw->size);
		buf_len = fw->size;
		release_firmware(fw);
	}

	ret_val = reset_and_clean_hw_buffer(fw_info);

	if (lmp_version != ROM_LMP_8723a) {
		RTKBT_DBG("%s: Not 8723a -> use new style patch", __func__);
		ret_val = get_eversion(fw_info);
		if (ret_val < 0) {
			RTKBT_ERR("%s: Failed to get eversion, errno %d", __func__, ret_val);
			goto fw_fail;
		}
		RTKBT_DBG("%s: Get eversion =%d", __func__, patch_entry->eversion);
		if (memcmp(epatch_buf + buf_len - 4, EXTENSION_SECTION_SIGNATURE, 4)) {
			RTKBT_ERR("%s: Failed to check extension section signature", __func__);
		} else {
			uint8_t *temp;
			temp = epatch_buf + buf_len - 5;
			do {
				if (*temp == 0x00) {
					patch_lmp.opcode = *temp;
					patch_lmp.length = *(temp-1);
					patch_lmp.data = vmalloc(patch_lmp.length);
					if (patch_lmp.data) {
						int k;
						for (k = 0; k < patch_lmp.length; k++) {
							*(patch_lmp.data+k) = *(temp-2-k);
							RTKBT_DBG("data = 0x%x", *(patch_lmp.data+k));
						}
					} else
					  goto fw_fail;
					RTKBT_DBG("%s: opcode = 0x%x, length = 0x%x, data = 0x%x", __func__,
							patch_lmp.opcode, patch_lmp.length, *(patch_lmp.data));
					break;
				}
				temp -= *(temp-1) + 2;
			} while (*temp != 0xFF);

			if (lmp_version != project_id[*(patch_lmp.data)]) {
				RTKBT_ERR("%s: Default lmp_version 0x%04x, project_id[%d] 0x%04x "
						"-> not match", __func__, lmp_version, *(patch_lmp.data), project_id[*(patch_lmp.data)]);
			} else {
				RTKBT_INFO("%s: Default lmp_version 0x%04x, project_id[%d] 0x%04x "
						"-> match", __func__, lmp_version, *(patch_lmp.data), project_id[*(patch_lmp.data)]);
				if (memcmp(epatch_buf, RTK_EPATCH_SIGNATURE, 8)) {
					RTKBT_ERR("%s: Check signature error", __func__);
				} else {
					epatch_info = (struct rtk_epatch *)epatch_buf;
					patch_entry->lmp_sub = (uint16_t)epatch_info->fw_version;

					RTKBT_DBG("%s: lmp version 0x%04x, fw_version 0x%x, "
							"number_of_total_patch %d", __func__,
							patch_entry->lmp_sub, epatch_info->fw_version,
							epatch_info->number_of_total_patch);
				}
			}
		}
	}

	RTKBT_DBG("%s: done", __func__);
fw_fail:
	if (epatch_buf)
		vfree(epatch_buf);
	if (patch_lmp.data)
		vfree(patch_lmp.data);
}

#if SUSPNED_DW_FW
static int load_suspend_firmware(firmware_info *fw_info, uint8_t **buff)
{
	const struct firmware *fw, *cfg;
	struct usb_device *udev;
	patch_info *patch_entry;
	char config_name[100] = {0};
	char fw_name[100] = {0};
	int fw_len = 0;
	int ret_val;

	int config_len = 0, buf_len = -1;
	uint8_t *buf = *buff, *config_file_buf = NULL;
	uint8_t *epatch_buf = NULL;

	struct rtk_epatch *epatch_info = NULL;
	uint8_t need_download_fw = 1;
	struct rtk_extension_entry patch_lmp = {0};
	struct rtk_epatch_entry *p_epatch_entry = NULL;
	uint16_t lmp_version;
	RTKBT_DBG("%s: start", __func__);

	udev = fw_info->udev;
	patch_entry = fw_info->patch_entry;
	lmp_version = patch_entry->lmp_sub_default;
	sprintf(config_name, "%s_suspend", patch_entry->config_name);
	sprintf(fw_name, "%s_suspend", patch_entry->patch_name);

	RTKBT_INFO("%s: Default lmp version = 0x%04x, config file name[%s], "
			"fw file name[%s]", __func__, lmp_version, config_name, fw_name);

	ret_val = request_firmware(&cfg, config_name, &udev->dev);
	if (ret_val < 0)
		config_len = 0;
	else {
		int i;
		rtk_update_altsettings(patch_entry, cfg->data, cfg->size, &config_file_buf, &config_len);

		RTKBT_INFO("Final Config len=%08x:\n", config_len);
		for (i = 0; i <= config_len; i += 0x10) {
			RTKBT_INFO("%08x: %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n", i, \
				config_file_buf[i], config_file_buf[i+1], config_file_buf[i+2], config_file_buf[i+3], config_file_buf[i+4], config_file_buf[i+5], config_file_buf[i+6], config_file_buf[i+7], \
				config_file_buf[i+8], config_file_buf[i+9], config_file_buf[i+10], config_file_buf[i+11], config_file_buf[i+12], config_file_buf[i+13], config_file_buf[i+14], config_file_buf[i+15]);
		}

		release_firmware(cfg);
	}

	ret_val = request_firmware(&fw, fw_name, &udev->dev);
	if (ret_val < 0)
		goto fw_fail;
	else {
		epatch_buf = vmalloc(fw->size);
		RTKBT_INFO("%s: epatch_buf = vmalloc(fw->size, GFP_KERNEL)", __func__);
		if (!epatch_buf) {
			release_firmware(fw);
			goto fw_fail;
		}
		memcpy(epatch_buf, fw->data, fw->size);
		fw_len = fw->size;
		buf_len = fw_len + config_len;
		release_firmware(fw);
	}

	RTKBT_DBG("%s: Not 8723a -> use new style patch", __func__);

	RTKBT_DBG("%s: get_eversion from bt controller", __func__);

	ret_val = get_eversion(fw_info);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to get eversion, errno %d", __func__, ret_val);
		goto fw_fail;
	}
	RTKBT_DBG("%s: Get eversion =%d", __func__, patch_entry->eversion);
	if (memcmp(epatch_buf + buf_len - config_len - 4, EXTENSION_SECTION_SIGNATURE, 4)) {
		RTKBT_ERR("%s: Failed to check extension section signature", __func__);
		need_download_fw = 0;
	} else {
		uint8_t *temp;
		temp = epatch_buf+buf_len-config_len - 5;
		do {
			if (*temp == 0x00) {
				patch_lmp.opcode = *temp;
				patch_lmp.length = *(temp-1);
				patch_lmp.data = kzalloc(patch_lmp.length, GFP_KERNEL);
				if (patch_lmp.data) {
					int k;
					for (k = 0; k < patch_lmp.length; k++) {
						*(patch_lmp.data+k) = *(temp-2-k);
						RTKBT_DBG("data = 0x%x", *(patch_lmp.data+k));
					}
				}
				RTKBT_DBG("%s: opcode = 0x%x, length = 0x%x, data = 0x%x", __func__,
					patch_lmp.opcode, patch_lmp.length, *(patch_lmp.data));
				break;
			}
			temp -= *(temp-1) + 2;
		} while (*temp != 0xFF);

		if (lmp_version != project_id[*(patch_lmp.data)]) {
			RTKBT_ERR("%s: Default lmp_version 0x%04x, project_id[%d] 0x%04x "
				"-> not match", __func__, lmp_version, *(patch_lmp.data), project_id[*(patch_lmp.data)]);
			if (patch_lmp.data)
				kfree(patch_lmp.data);
			need_download_fw = 0;
		} else {
			RTKBT_INFO("%s: Default lmp_version 0x%04x, project_id[%d] 0x%04x "
				"-> match", __func__, lmp_version, *(patch_lmp.data), project_id[*(patch_lmp.data)]);
			if (patch_lmp.data)
				kfree(patch_lmp.data);
			if (memcmp(epatch_buf, RTK_EPATCH_SIGNATURE, 8)) {
				RTKBT_ERR("%s: Check signature error", __func__);
				need_download_fw = 0;
			} else {
				epatch_info = (struct rtk_epatch *)epatch_buf;
				patch_entry->lmp_sub = (uint16_t)epatch_info->fw_version;

				RTKBT_DBG("%s: lmp version 0x%04x, fw_version 0x%x, "
					"number_of_total_patch %d", __func__,
					patch_entry->lmp_sub, epatch_info->fw_version,
					epatch_info->number_of_total_patch);

			 /* Get right epatch entry */
				p_epatch_entry = get_fw_patch_entry(epatch_info, patch_entry->eversion);
				if (p_epatch_entry == NULL) {
					RTKBT_WARN("%s: Failed to get fw patch entry", __func__);
					ret_val = -1;
					goto fw_fail ;
				}

				buf_len = p_epatch_entry->patch_length + config_len;
				RTKBT_DBG("buf_len = 0x%x", buf_len);

				buf = kzalloc(buf_len, GFP_KERNEL);
				if (!buf) {
					RTKBT_ERR("%s: Can't alloc memory for  fw&config", __func__);
					buf_len = -1;
					kfree(p_epatch_entry);
				} else {
					memcpy(buf, &epatch_buf[p_epatch_entry->start_offset], p_epatch_entry->patch_length);
					memcpy(&buf[p_epatch_entry->patch_length-4], &epatch_info->fw_version, 4);
					kfree(p_epatch_entry);
				}
				vfree(epatch_buf);
				RTKBT_INFO("%s: vfree(epatch_buf)", __func__);
				epatch_buf = NULL;

				if (config_len)
					memcpy(&buf[buf_len - config_len], config_file_buf, config_len);
			}
		}
	}

	RTKBT_INFO("%s: fw%s exists, config file%s exists", __func__,
			(buf_len > 0) ? "" : " not", (config_len > 0) ? "":" not");

	if (buf && buf_len > 0 && need_download_fw)
		*buff = buf;

	RTKBT_DBG("%s: done", __func__);

	return buf_len;

fw_fail:
	return ret_val;
}
#endif

int get_firmware(firmware_info *fw_info, int cached)
{
	patch_info *patch_entry = fw_info->patch_entry;

	RTKBT_INFO("%s: start, cached %d,patch_entry->fw_len= %d", __func__, cached, patch_entry->fw_len);

	if (cached > 0) {
		if (patch_entry->fw_len > 0) {
			fw_info->fw_data = kzalloc(patch_entry->fw_len, GFP_KERNEL);
			if (!fw_info->fw_data)
				return -ENOMEM;
			memcpy(fw_info->fw_data, patch_entry->fw_cache, patch_entry->fw_len);
			fw_info->fw_len = patch_entry->fw_len;
		} else {
			fw_info->fw_len = load_firmware(fw_info, &fw_info->fw_data);
			if (fw_info->fw_len <= 0)
				return -1;
		}
	} else {
		fw_info->fw_len = load_firmware(fw_info, &fw_info->fw_data);
		if (fw_info->fw_len <= 0)
			return -1;
	}

	return 0;
}

#if SUSPNED_DW_FW
static int get_suspend_firmware(firmware_info *fw_info, int cached)
{
	patch_info *patch_entry = fw_info->patch_entry;

	RTKBT_INFO("%s: start, cached %d,patch_entry->fw_len= %d", __func__, cached, patch_entry->fw_len);

	if (cached > 0) {
		if (patch_entry->fw_len > 0) {
			fw_info->fw_data = kzalloc(patch_entry->fw_len, GFP_KERNEL);
			if (!fw_info->fw_data)
				return -ENOMEM;
			memcpy(fw_info->fw_data, patch_entry->fw_cache, patch_entry->fw_len);
			fw_info->fw_len = patch_entry->fw_len;
		} else {
			fw_info->fw_len = load_suspend_firmware(fw_info, &fw_info->fw_data);
			if (fw_info->fw_len <= 0)
				return -1;
		}
	} else {
		fw_info->fw_len = load_suspend_firmware(fw_info, &fw_info->fw_data);
		if (fw_info->fw_len <= 0)
			return -1;
	}

	return 0;
}
#endif

/*
 * Open the log message only if in debugging,
 * or it will decelerate download procedure.
 */
int download_data(firmware_info *fw_info)
{
	download_cp *cmd_para;
	download_rp *evt_para;
	uint8_t *pcur;
	int pkt_len, frag_num, frag_len;
	int i, ret_val;
	int ncmd = 1, step = 1;

	RTKBT_DBG("%s: start", __func__);

	cmd_para = (download_cp *)fw_info->req_para;
	evt_para = (download_rp *)fw_info->rsp_para;
	pcur = fw_info->fw_data;
	pkt_len = CMD_HDR_LEN + sizeof(download_cp);
	frag_num = fw_info->fw_len / PATCH_SEG_MAX + 1;
	frag_len = PATCH_SEG_MAX;

	for (i = 0; i < frag_num; i++) {
		cmd_para->index = i?((i-1)%0x7f+1):0;
		if (i == (frag_num - 1)) {
			cmd_para->index |= DATA_END;
			frag_len = fw_info->fw_len % PATCH_SEG_MAX;
			pkt_len -= (PATCH_SEG_MAX - frag_len);
		}
		fw_info->cmd_hdr->opcode = cpu_to_le16(DOWNLOAD_OPCODE);
		fw_info->cmd_hdr->plen = sizeof(uint8_t) + frag_len;
		fw_info->pkt_len = pkt_len;
		memcpy(cmd_para->data, pcur, frag_len);

		if (step > 0) {
			ret_val = send_hci_cmd(fw_info);
			if (ret_val < 0) {
				RTKBT_DBG("%s: Failed to send frag num %d", __func__, cmd_para->index);
				return ret_val;
			} else
				RTKBT_DBG("%s: Send frag num %d", __func__, cmd_para->index);

			if (--step > 0 && i < frag_num - 1) {
				RTKBT_DBG("%s: Continue to send frag num %d", __func__, cmd_para->index + 1);
				pcur += PATCH_SEG_MAX;
				continue;
			}
		}

		while (ncmd > 0) {
			ret_val = rcv_hci_evt(fw_info);
			if (ret_val < 0) {
				RTKBT_ERR("%s: rcv_hci_evt err %d", __func__, ret_val);
				return ret_val;
			} else {
				RTKBT_DBG("%s: Receive acked frag num %d", __func__, evt_para->index);
				ncmd--;
			}

			if (0 != evt_para->status) {
				RTKBT_ERR("%s: Receive acked frag num %d, err status %d",
						__func__, ret_val, evt_para->status);
				return -1;
			}

			if ((evt_para->index & DATA_END) || (evt_para->index == frag_num - 1)) {
				RTKBT_DBG("%s: Receive last acked index %d", __func__, evt_para->index);
				goto end;
			}
		}

		ncmd = step = fw_info->cmd_cmp->ncmd;
		pcur += PATCH_SEG_MAX;
		RTKBT_DBG("%s: HCI command packet num %d", __func__, ncmd);
	}

	/*
	 * It is tricky that Host cannot receive DATA_END index from BT
	 * controller, at least for 8723au. We are doomed if failed.
	 */
#if 0
	/* Continue to receive the responsed events until last index occurs */
	if (i == frag_num) {
		RTKBT_DBG("%s: total frag count %d", __func__, frag_num);
		while (!(evt_para->index & DATA_END)) {
			ret_val = rcv_hci_evt(fw_info);
			if (ret_val < 0) {
				RTKBT_ERR("%s: rcv_hci_evt err %d", __func__, ret_val);
				return ret_val;
			}
			if (0 != evt_para->status)
				return -1;
			RTKBT_DBG("%s: continue to receive acked frag num %d", __func__, evt_para->index);
		}
	}
#endif
end:
	RTKBT_INFO("%s: done, sent %d frag pkts, received %d frag events",
			__func__, cmd_para->index, evt_para->index);
	return fw_info->fw_len;
}

int download_patch(firmware_info *fw_info, int cached)
{
	int ret_val = 0;

	RTKBT_DBG("%s: Download fw patch start, cached %d", __func__, cached);

	if (!fw_info || !fw_info->patch_entry) {
		RTKBT_ERR("%s: No patch entry exists(fw_info %p)", __func__, fw_info);
		ret_val = -1;
		goto end;
	}

	/*
	 * step1: get local firmware if existed
	 * step2: check firmware version
	 * step3: download firmware if updated
	 */
	ret_val = get_firmware(fw_info, cached);
	if (ret_val < 0) {
		RTKBT_ERR("%s: Failed to get firmware", __func__);
		goto end;
	}

#if SUSPNED_DW_FW
	if (fw_info_4_suspend) {
		RTKBT_DBG("%s: get suspend fw first cached %d", __func__, cached);
		ret_val = get_suspend_firmware(fw_info_4_suspend, cached);
		if (ret_val < 0) {
			RTKBT_ERR("%s: Failed to get suspend firmware", __func__);
			goto end;
		}
	}
#endif

	/*check the length of fw to be download*/
	RTKBT_DBG("%s: Check fw_info->fw_len:%d max_patch_size %d", __func__, fw_info->fw_len, fw_info->patch_entry->max_patch_size);
	if (fw_info->fw_len > fw_info->patch_entry->max_patch_size) {
		RTKBT_ERR("%s: Total length of fw&config(%08x) larger than max_patch_size 0x%08x", __func__, fw_info->fw_len, fw_info->patch_entry->max_patch_size);
		ret_val = -1;
		goto free;
	}

	ret_val = check_fw_version(fw_info, false);

	if (2 == ret_val) {
		RTKBT_ERR("%s: Cold reset bt chip only download", __func__);
		ret_val = download_data(fw_info);
		if (ret_val > 0)
			RTKBT_ERR("%s: Download fw patch done, fw len %d", __func__, ret_val);
	} else if (1 == ret_val) {
		//   reset bt chip to update Fw patch
		ret_val = reset_controller(fw_info);
		RTKBT_ERR("%s: reset bt chip to update Fw patch, fw len %d", __func__, ret_val);
		ret_val = download_data(fw_info);
		if (ret_val > 0)
				RTKBT_ERR("%s: Download fw patch done, fw len %d", __func__, ret_val);
	}


free:
	/* Free fw data after download finished */
	kfree(fw_info->fw_data);
	fw_info->fw_data = NULL;

end:
	return ret_val;
}

#if SUSPNED_DW_FW
static int download_suspend_patch(firmware_info *fw_info, int cached)
{
	int ret_val = 0;

	RTKBT_DBG("%s: Download fw patch start, cached %d", __func__, cached);

	if (!fw_info || !fw_info->patch_entry) {
		RTKBT_ERR("%s: No patch entry exists(fw_info %p)", __func__, fw_info);
		ret_val = -1;
		goto end;
	}

	/*check the length of fw to be download*/
	RTKBT_DBG("%s:Check RTK_PATCH_LENGTH fw_info->fw_len:%d", __func__, fw_info->fw_len);
	if (fw_info->fw_len > fw_info->patch_entry->max_patch_size || fw_info->fw_len == 0) {
		RTKBT_ERR("%s: Total length of fw&config(%08x) larger than max_patch_size 0x%08x", __func__, fw_info->fw_len, fw_info->patch_entry->max_patch_size);
		ret_val = -1;
		goto free;
	}

	ret_val = check_fw_version(fw_info, false);

	if (2 == ret_val) {
		RTKBT_ERR("%s: Cold reset bt chip only download", __func__);
		ret_val = download_data(fw_info);
		if (ret_val > 0)
			RTKBT_ERR("%s: Download fw patch done, fw len %d", __func__, ret_val);
	} else if (1 == ret_val) {
		//   reset bt chip to update Fw patch
		ret_val = reset_controller(fw_info);
		RTKBT_ERR("%s: reset bt chip to update Fw patch, fw len %d", __func__, ret_val);
		ret_val = download_data(fw_info);
		if (ret_val > 0)
				RTKBT_ERR("%s: Download fw patch done, fw len %d", __func__, ret_val);
	}


free:
	/* Free fw data after download finished */
	kfree(fw_info->fw_data);
	fw_info->fw_data = NULL;

end:
	return ret_val;
}

static void suspend_firmware_info_init(firmware_info *fw_info)
{
	RTKBT_DBG("%s: start", __func__);
	if (!fw_info)
		return;

	fw_info_4_suspend = kzalloc(sizeof(*fw_info), GFP_KERNEL);
	if (!fw_info_4_suspend)
		goto error;

	fw_info_4_suspend->send_pkt = kzalloc(PKT_LEN, GFP_KERNEL);
	if (!fw_info_4_suspend->send_pkt) {
		kfree(fw_info_4_suspend);
		goto error;
	}

	fw_info_4_suspend->rcv_pkt = kzalloc(PKT_LEN, GFP_KERNEL);
	if (!fw_info_4_suspend->rcv_pkt) {
		kfree(fw_info_4_suspend->send_pkt);
		kfree(fw_info_4_suspend);
		goto error;
	}

	fw_info_4_suspend->patch_entry = get_suspend_fw_table_entry(fw_info->udev);
	if (!fw_info_4_suspend->patch_entry) {
		kfree(fw_info_4_suspend->rcv_pkt);
		kfree(fw_info_4_suspend->send_pkt);
		kfree(fw_info_4_suspend);
		goto error;
	}

	fw_info_4_suspend->intf = fw_info->intf;
	fw_info_4_suspend->udev = fw_info->udev;
	fw_info_4_suspend->cmd_hdr = (struct hci_command_hdr *)(fw_info_4_suspend->send_pkt);
	fw_info_4_suspend->evt_hdr = (struct hci_event_hdr *)(fw_info_4_suspend->rcv_pkt);
	fw_info_4_suspend->cmd_cmp = (struct hci_ev_cmd_complete *)(fw_info_4_suspend->rcv_pkt + EVT_HDR_LEN);
	fw_info_4_suspend->req_para = fw_info_4_suspend->send_pkt + CMD_HDR_LEN;
	fw_info_4_suspend->rsp_para = fw_info_4_suspend->rcv_pkt + EVT_HDR_LEN + CMD_CMP_LEN;
	fw_info_4_suspend->pipe_in = fw_info->pipe_in;
	fw_info_4_suspend->pipe_out = fw_info->pipe_out;

	return;
error:
	RTKBT_DBG("%s: fail !", __func__);
	fw_info_4_suspend = NULL;
	return;
}
#endif

#if SET_WAKEUP_DEVICE
static void set_wakeup_device_from_conf(firmware_info *fw_info)
{
	uint8_t paired_wakeup_bdaddr[7];
	uint8_t num = 0;
	int i;
	struct file *fp;
	mm_segment_t fs;
	loff_t pos;

	memset(paired_wakeup_bdaddr, 0, 7);
	fp = filp_open(SET_WAKEUP_DEVICE_CONF, O_RDWR, 0);
	if (!IS_ERR(fp)) {
		fs = get_fs();
		set_fs(KERNEL_DS);
		pos = 0;
		//read number
		vfs_read(fp, &num, 1, &pos);
		RTKBT_DBG("read number = %d", num);
		if (num) {
			for (i = 0; i < num; i++) {
				vfs_read(fp, paired_wakeup_bdaddr, 7, &pos);
				RTKBT_DBG("paired_wakeup_bdaddr: 0x%02x:0x%02x:0x%02x:0x%02x:0x%02x:0x%02x",
						paired_wakeup_bdaddr[1], paired_wakeup_bdaddr[2], paired_wakeup_bdaddr[3],
						paired_wakeup_bdaddr[4], paired_wakeup_bdaddr[5], paired_wakeup_bdaddr[6]);
						set_wakeup_device(fw_info, paired_wakeup_bdaddr);
			}
		}
		filp_close(fp, NULL);
		set_fs(fs);
	} else {
		RTKBT_ERR("open wakeup config file fail! errno = %ld", PTR_ERR(fp));
	}
}
#endif

firmware_info *firmware_info_init(struct usb_interface *intf)
{
	struct usb_device *udev = interface_to_usbdev(intf);
	firmware_info *fw_info;

	RTKBT_DBG("%s: start", __func__);

	fw_info = kzalloc(sizeof(*fw_info), GFP_KERNEL);
	if (!fw_info)
		return NULL;

	fw_info->send_pkt = kzalloc(PKT_LEN, GFP_KERNEL);
	if (!fw_info->send_pkt) {
		kfree(fw_info);
		return NULL;
	}

	fw_info->rcv_pkt = kzalloc(PKT_LEN, GFP_KERNEL);
	if (!fw_info->rcv_pkt) {
		kfree(fw_info->send_pkt);
		kfree(fw_info);
		return NULL;
	}

	fw_info->patch_entry = get_fw_table_entry(udev);
	if (!fw_info->patch_entry) {
		kfree(fw_info->rcv_pkt);
		kfree(fw_info->send_pkt);
		kfree(fw_info);
		return NULL;
	}

	fw_info->intf = intf;
	fw_info->udev = udev;
	fw_info->pipe_in = usb_rcvintpipe(fw_info->udev, INTR_EP);
	fw_info->pipe_out = usb_sndctrlpipe(fw_info->udev, CTRL_EP);
	fw_info->cmd_hdr = (struct hci_command_hdr *)(fw_info->send_pkt);
	fw_info->evt_hdr = (struct hci_event_hdr *)(fw_info->rcv_pkt);
	fw_info->cmd_cmp = (struct hci_ev_cmd_complete *)(fw_info->rcv_pkt + EVT_HDR_LEN);
	fw_info->req_para = fw_info->send_pkt + CMD_HDR_LEN;
	fw_info->rsp_para = fw_info->rcv_pkt + EVT_HDR_LEN + CMD_CMP_LEN;

#if SUSPNED_DW_FW
	suspend_firmware_info_init(fw_info);
#endif

#if BTUSB_RPM
	RTKBT_INFO("%s: Auto suspend is enabled", __func__);
	usb_enable_autosuspend(udev);
	pm_runtime_set_autosuspend_delay(&(udev->dev), 2000);
#else
	RTKBT_INFO("%s: Auto suspend is disabled", __func__);
	usb_disable_autosuspend(udev);
#endif

#if BTUSB_WAKEUP_HOST
	device_wakeup_enable(&udev->dev);
#endif

	return fw_info;
}

void firmware_info_destroy(struct usb_interface *intf)
{
	firmware_info *fw_info;
	struct usb_device *udev;
	struct btusb_data *data;

	udev = interface_to_usbdev(intf);
	data = usb_get_intfdata(intf);

	fw_info = data->fw_info;
	if (!fw_info)
		return;

#if BTUSB_RPM
	usb_disable_autosuspend(udev);
#endif

	/*
	 * In order to reclaim fw data mem, we free fw_data immediately
	 * after download patch finished instead of here.
	 */
	kfree(fw_info->rcv_pkt);
	kfree(fw_info->send_pkt);
	kfree(fw_info);

#if SUSPNED_DW_FW
	if (!fw_info_4_suspend)
		return;

	kfree(fw_info_4_suspend->rcv_pkt);
	kfree(fw_info_4_suspend->send_pkt);
	kfree(fw_info_4_suspend->patch_entry);
	kfree(fw_info_4_suspend);
	fw_info_4_suspend = NULL;
#endif
}

static struct usb_driver btusb_driver;

static struct usb_device_id btusb_table[] = {
	{ .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
					 USB_DEVICE_ID_MATCH_INT_INFO,
	  .idVendor = 0x0bda,
	  .bInterfaceClass = 0xe0,
	  .bInterfaceSubClass = 0x01,
	  .bInterfaceProtocol = 0x01 },

	{ .match_flags = USB_DEVICE_ID_MATCH_VENDOR |
					 USB_DEVICE_ID_MATCH_INT_INFO,
	  .idVendor = 0x13d3,
	  .bInterfaceClass = 0xe0,
	  .bInterfaceSubClass = 0x01,
	  .bInterfaceProtocol = 0x01 },

	{ }
};

MODULE_DEVICE_TABLE(usb, btusb_table);

static int inc_tx(struct btusb_data *data)
{
	unsigned long flags;
	int rv;

	spin_lock_irqsave(&data->txlock, flags);
	rv = test_bit(BTUSB_SUSPENDING, &data->flags);
	if (!rv)
		data->tx_in_flight++;
	spin_unlock_irqrestore(&data->txlock, flags);

	return rv;
}

void check_sco_event(struct urb *urb)
{
	u8 *opcode = (u8 *)(urb->transfer_buffer);
	u8 status;
	uint16_t handle;
	struct hci_dev *hdev = urb->context;
	struct btusb_data *data = GET_DRV_DATA(hdev);

	switch (*opcode) {
	case HCI_EV_SYNC_CONN_COMPLETE:
		RTKBT_INFO("%s: HCI_EV_SYNC_CONN_COMPLETE(0x%02x)", __func__, *opcode);
		status = *(opcode + 2);
		data->sco_handle = *(opcode + 3) | *(opcode + 4) << 8;
		//hdev->voice_setting = *(uint16_t*)&opcode[15];
		if (status == 0) {
			hdev->conn_hash.sco_num++;
			hdev->notify(hdev, 0);
		}
		break;
	case HCI_EV_DISCONN_COMPLETE:
		status = *(opcode + 2);
		handle = *(opcode + 3) | *(opcode + 4) << 8;
		if (status == 0 && data->sco_handle == handle) {
			RTKBT_INFO("%s: SCO HCI_EV_DISCONN_COMPLETE(0x%02x)", __func__, *opcode);
			hdev->conn_hash.sco_num--;
			hdev->notify(hdev, 0);
			data->sco_handle = 0;
		}
		break;
	default:
		RTKBT_DBG("%s: event 0x%02x", __func__, *opcode);
		break;
	}
}

static void btusb_intr_complete(struct urb *urb)
{
	struct hci_dev *hdev = urb->context;
	struct btusb_data *data = GET_DRV_DATA(hdev);
	int err;

	RTKBT_DBG("%s: urb %p status %d count %d ", __func__,
			urb, urb->status, urb->actual_length);

#ifdef CONFIG_SCO_OVER_HCI
	check_sco_event(urb);
#endif

	if (!test_bit(HCI_RUNNING, &hdev->flags))
		return;


	if (urb->status == 0) {
		hdev->stat.byte_rx += urb->actual_length;

		if (hci_recv_fragment(hdev, HCI_EVENT_PKT,
						urb->transfer_buffer,
						urb->actual_length) < 0) {
			RTKBT_ERR("%s: Corrupted event packet", __func__);
			hdev->stat.err_rx++;
		}
	} else if (urb->status == -ENOENT) {/* Avoid suspend failed when usb_kill_urb */
		return;
	}

	if (!test_bit(BTUSB_INTR_RUNNING, &data->flags))
		return;

	usb_mark_last_busy(data->udev);
	usb_anchor_urb(urb, &data->intr_anchor);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
		/* EPERM: urb is being killed;
		 * ENODEV: device got disconnected */
		if (err != -EPERM && err != -ENODEV)
			RTKBT_ERR("%s: Failed to re-submit urb %p, err %d",
					__func__, urb, err);
		usb_unanchor_urb(urb);
	}
}

static int btusb_submit_intr_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	struct urb *urb;
	unsigned char *buf;
	unsigned int pipe;
	int err, size;

	if (!data->intr_ep)
		return -ENODEV;

	urb = usb_alloc_urb(0, mem_flags);
	if (!urb)
		return -ENOMEM;

	size = le16_to_cpu(data->intr_ep->wMaxPacketSize);

	buf = kmalloc(size, mem_flags);
	if (!buf) {
		usb_free_urb(urb);
		return -ENOMEM;
	}

	RTKBT_DBG("%s: mMaxPacketSize %d, bEndpointAddress 0x%02x",
			__func__, size, data->intr_ep->bEndpointAddress);

	pipe = usb_rcvintpipe(data->udev, data->intr_ep->bEndpointAddress);

	usb_fill_int_urb(urb, data->udev, pipe, buf, size,
						btusb_intr_complete, hdev,
						data->intr_ep->bInterval);

	urb->transfer_flags |= URB_FREE_BUFFER;

	usb_anchor_urb(urb, &data->intr_anchor);

	err = usb_submit_urb(urb, mem_flags);
	if (err < 0) {
		RTKBT_ERR("%s: Failed to submit urb %p, err %d",
				__func__, urb, err);
		usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	return err;
}

static void btusb_bulk_complete(struct urb *urb)
{
	struct hci_dev *hdev = urb->context;
	struct btusb_data *data = GET_DRV_DATA(hdev);
	int err;

	RTKBT_DBG("%s: urb %p status %d count %d",
			__func__, urb, urb->status, urb->actual_length);

	if (!test_bit(HCI_RUNNING, &hdev->flags))
		return;

	if (urb->status == 0) {
		hdev->stat.byte_rx += urb->actual_length;

		if (hci_recv_fragment(hdev, HCI_ACLDATA_PKT,
						urb->transfer_buffer,
						urb->actual_length) < 0) {
			RTKBT_ERR("%s: Corrupted ACL packet", __func__);
			hdev->stat.err_rx++;
		}
	} else if (urb->status == -ENOENT) { /* Avoid suspend failed when usb_kill_urb */
		return;
	}

	if (!test_bit(BTUSB_BULK_RUNNING, &data->flags))
		return;

	usb_anchor_urb(urb, &data->bulk_anchor);
	usb_mark_last_busy(data->udev);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
		/* -EPERM: urb is being killed;
		 * -ENODEV: device got disconnected */
		if (err != -EPERM && err != -ENODEV)
			RTKBT_ERR("btusb_bulk_complete %s urb %p failed to resubmit (%d)",
						hdev->name, urb, -err);
		usb_unanchor_urb(urb);
	}
}

static int btusb_submit_bulk_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	struct urb *urb;
	unsigned char *buf;
	unsigned int pipe;
	int err, size = HCI_MAX_FRAME_SIZE;

	RTKBT_DBG("%s: hdev name %s", __func__, hdev->name);

	if (!data->bulk_rx_ep)
		return -ENODEV;

	urb = usb_alloc_urb(0, mem_flags);
	if (!urb)
		return -ENOMEM;

	buf = kmalloc(size, mem_flags);
	if (!buf) {
		usb_free_urb(urb);
		return -ENOMEM;
	}

	pipe = usb_rcvbulkpipe(data->udev, data->bulk_rx_ep->bEndpointAddress);

	usb_fill_bulk_urb(urb, data->udev, pipe,
					buf, size, btusb_bulk_complete, hdev);

	urb->transfer_flags |= URB_FREE_BUFFER;

	usb_mark_last_busy(data->udev);
	usb_anchor_urb(urb, &data->bulk_anchor);

	err = usb_submit_urb(urb, mem_flags);
	if (err < 0) {
		RTKBT_ERR("%s: Failed to submit urb %p, err %d", __func__, urb, err);
		usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	return err;
}

static void btusb_isoc_complete(struct urb *urb)
{
	struct hci_dev *hdev = urb->context;
	struct btusb_data *data = GET_DRV_DATA(hdev);
	int i, err;


	RTKBT_DBG("%s: urb %p status %d count %d",
			__func__, urb, urb->status, urb->actual_length);

	if (!test_bit(HCI_RUNNING, &hdev->flags) || !test_bit(BTUSB_ISOC_RUNNING, &data->flags))
		return;

	if (urb->status == 0) {
		for (i = 0; i < urb->number_of_packets; i++) {
			unsigned int offset = urb->iso_frame_desc[i].offset;
			unsigned int length = urb->iso_frame_desc[i].actual_length;

			if (urb->iso_frame_desc[i].status)
				continue;

			hdev->stat.byte_rx += length;

			if (hci_recv_fragment(hdev, HCI_SCODATA_PKT,
						urb->transfer_buffer + offset,
								length) < 0) {
				RTKBT_ERR("%s: Corrupted SCO packet", __func__);
				hdev->stat.err_rx++;
			}
		}
	} else if (urb->status == -ENOENT) { /* Avoid suspend failed when usb_kill_urb */
		return;
	}

	usb_anchor_urb(urb, &data->isoc_anchor);
	i = 0;
retry:
	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
		/* -EPERM: urb is being killed;
		 * -ENODEV: device got disconnected */
		if (err != -EPERM && err != -ENODEV)
			RTKBT_ERR("%s: Failed to re-sumbit urb %p, retry %d, err %d",
					__func__, urb, i, err);
		if (i < 10) {
			i++;
			mdelay(1);
			goto retry;
		}

		usb_unanchor_urb(urb);
	}
}

static inline void fill_isoc_descriptor(struct urb *urb, int len, int mtu)
{
	int i, offset = 0;

	RTKBT_DBG("%s: len %d mtu %d", __func__, len, mtu);

	for (i = 0; i < BTUSB_MAX_ISOC_FRAMES && len >= mtu;
					i++, offset += mtu, len -= mtu) {
		urb->iso_frame_desc[i].offset = offset;
		urb->iso_frame_desc[i].length = mtu;
	}

	if (len && i < BTUSB_MAX_ISOC_FRAMES) {
		urb->iso_frame_desc[i].offset = offset;
		urb->iso_frame_desc[i].length = len;
		i++;
	}

	urb->number_of_packets = i;
}

static int btusb_submit_isoc_urb(struct hci_dev *hdev, gfp_t mem_flags)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	struct urb *urb;
	unsigned char *buf;
	unsigned int pipe;
	int err, size;

	if (!data->isoc_rx_ep)
		return -ENODEV;

	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, mem_flags);
	if (!urb)
		return -ENOMEM;

	size = le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize) *
						BTUSB_MAX_ISOC_FRAMES;

	buf = kmalloc(size, mem_flags);
	if (!buf) {
		usb_free_urb(urb);
		return -ENOMEM;
	}

	pipe = usb_rcvisocpipe(data->udev, data->isoc_rx_ep->bEndpointAddress);

	urb->dev	  = data->udev;
	urb->pipe	 = pipe;
	urb->context  = hdev;
	urb->complete = btusb_isoc_complete;
	urb->interval = data->isoc_rx_ep->bInterval;

	urb->transfer_flags  = URB_FREE_BUFFER | URB_ISO_ASAP;
	urb->transfer_buffer = buf;
	urb->transfer_buffer_length = size;

	fill_isoc_descriptor(urb, size,
			le16_to_cpu(data->isoc_rx_ep->wMaxPacketSize));

	usb_anchor_urb(urb, &data->isoc_anchor);

	err = usb_submit_urb(urb, mem_flags);
	if (err < 0) {
		RTKBT_ERR("%s: Failed to submit urb %p, err %d", __func__, urb, err);
		usb_unanchor_urb(urb);
	}

	usb_free_urb(urb);

	return err;
}

static void btusb_tx_complete(struct urb *urb)
{
	struct sk_buff *skb = urb->context;
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
	struct btusb_data *data = GET_DRV_DATA(hdev);

	if (!test_bit(HCI_RUNNING, &hdev->flags))
		goto done;

	if (!urb->status)
		hdev->stat.byte_tx += urb->transfer_buffer_length;
	else
		hdev->stat.err_tx++;

done:
	spin_lock(&data->txlock);
	data->tx_in_flight--;
	spin_unlock(&data->txlock);

	kfree(urb->setup_packet);

	kfree_skb(skb);
}

static void btusb_isoc_tx_complete(struct urb *urb)
{
	struct sk_buff *skb = urb->context;
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

	RTKBT_DBG("%s: urb %p status %d count %d",
			__func__, urb, urb->status, urb->actual_length);

	if (skb && hdev) {
		if (!test_bit(HCI_RUNNING, &hdev->flags))
			goto done;

		if (!urb->status)
			hdev->stat.byte_tx += urb->transfer_buffer_length;
		else
			hdev->stat.err_tx++;
	} else
		RTKBT_ERR("%s: skb 0x%p hdev 0x%p", __func__, skb, hdev);

done:
	kfree(urb->setup_packet);

	kfree_skb(skb);
}

static int btusb_open(struct hci_dev *hdev)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	int err = 0;

	RTKBT_INFO("%s: Start, PM usage count %d", __func__,
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0)
		  atomic_read(&data->intf->pm_usage_cnt)
#else
		  0
#endif
	);

	err = usb_autopm_get_interface(data->intf);
	if (err < 0)
		return err;

	data->intf->needs_remote_wakeup = 1;

	if (test_and_set_bit(HCI_RUNNING, &hdev->flags))
		goto done;

	if (test_and_set_bit(BTUSB_INTR_RUNNING, &data->flags))
		goto done;

	err = btusb_submit_intr_urb(hdev, GFP_KERNEL);
	if (err < 0)
		goto failed;

	err = btusb_submit_bulk_urb(hdev, GFP_KERNEL);
	if (err < 0) {
		mdelay(URB_CANCELING_DELAY_MS);
		usb_kill_anchored_urbs(&data->intr_anchor);
		goto failed;
	}

	set_bit(BTUSB_BULK_RUNNING, &data->flags);
	btusb_submit_bulk_urb(hdev, GFP_KERNEL);

done:
	usb_autopm_put_interface(data->intf);

	RTKBT_INFO("%s: End, PM usage count %d", __func__,
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0)
		  atomic_read(&data->intf->pm_usage_cnt)
#else
		  0
#endif
	 );
	return 0;

failed:
	clear_bit(BTUSB_INTR_RUNNING, &data->flags);
	clear_bit(HCI_RUNNING, &hdev->flags);
	usb_autopm_put_interface(data->intf);

	RTKBT_ERR("%s: Failed, PM usage count %d", __func__,
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0)
		  atomic_read(&data->intf->pm_usage_cnt)
#else
		  0
#endif
		);
	return err;
}

static void btusb_stop_traffic(struct btusb_data *data)
{
	mdelay(URB_CANCELING_DELAY_MS);
	usb_kill_anchored_urbs(&data->intr_anchor);
	usb_kill_anchored_urbs(&data->bulk_anchor);
	usb_kill_anchored_urbs(&data->isoc_anchor);
}

static int btusb_close(struct hci_dev *hdev)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	int i, err;

	RTKBT_INFO("%s: hci running %lu", __func__, hdev->flags & HCI_RUNNING);

	if (!test_and_clear_bit(HCI_RUNNING, &hdev->flags))
		return 0;

	for (i = 0; i < NUM_REASSEMBLY; i++) {
		if (hdev->reassembly[i]) {
			RTKBT_DBG("%s: free ressembly[%d]", __func__, i);
			kfree_skb(hdev->reassembly[i]);
			hdev->reassembly[i] = NULL;
		}
	}

	cancel_work_sync(&data->work);
	cancel_work_sync(&data->waker);

	clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
	clear_bit(BTUSB_BULK_RUNNING, &data->flags);
	clear_bit(BTUSB_INTR_RUNNING, &data->flags);

	btusb_stop_traffic(data);
	err = usb_autopm_get_interface(data->intf);
	if (err < 0)
		goto failed;

	data->intf->needs_remote_wakeup = 0;
	usb_autopm_put_interface(data->intf);

failed:
	mdelay(URB_CANCELING_DELAY_MS);
	usb_scuttle_anchored_urbs(&data->deferred);
	return 0;
}

static int btusb_flush(struct hci_dev *hdev)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);

	RTKBT_DBG("%s", __func__);

	mdelay(URB_CANCELING_DELAY_MS);
	usb_kill_anchored_urbs(&data->tx_anchor);

	return 0;
}

#ifdef CONFIG_SCO_OVER_HCI
static void btusb_isoc_snd_tx_complete(struct urb *urb);

static int snd_send_sco_frame(struct sk_buff *skb)
{
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

	struct btusb_data *data = GET_DRV_DATA(hdev);
	//struct usb_ctrlrequest *dr;
	struct urb *urb;
	unsigned int pipe;
	int err;

	RTKBT_DBG("%s:pkt type %d, packet_len : %d",
			__func__, bt_cb(skb)->pkt_type, skb->len);

	if (!hdev && !test_bit(HCI_RUNNING, &hdev->flags))
		return -EBUSY;

	if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1) {
		kfree(skb);
		return -ENODEV;
	}

	urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
	if (!urb) {
		RTKBT_ERR("%s: Failed to allocate mem for sco pkts", __func__);
		kfree(skb);
		return -ENOMEM;
	}

	pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);

	usb_fill_int_urb(urb, data->udev, pipe,
			skb->data, skb->len, btusb_isoc_snd_tx_complete,
			skb, data->isoc_tx_ep->bInterval);

	urb->transfer_flags  = URB_ISO_ASAP;

	fill_isoc_descriptor(urb, skb->len,
			le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));

	hdev->stat.sco_tx++;

	usb_anchor_urb(urb, &data->tx_anchor);

	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
		RTKBT_ERR("%s: Failed to submit urb %p, pkt type %d, err %d",
				__func__, urb, bt_cb(skb)->pkt_type, err);
		kfree(urb->setup_packet);
		usb_unanchor_urb(urb);
	} else
		usb_mark_last_busy(data->udev);
	usb_free_urb(urb);

	return err;

}

static bool snd_copy_send_sco_data(RTK_sco_card_t *pSCOSnd)
{
	struct snd_pcm_runtime *runtime = pSCOSnd->playback.substream->runtime;
	  unsigned int frame_bytes = 2, frames1;
	const u8 *source;

	snd_pcm_uframes_t period_size = runtime->period_size;
	int i, count;
	u8 buffer[period_size * 3];
	int sco_packet_bytes = pSCOSnd->playback.sco_packet_bytes;
	struct sk_buff *skb;

	count = frames_to_bytes(runtime, period_size)/sco_packet_bytes;
	skb = bt_skb_alloc(((sco_packet_bytes + HCI_SCO_HDR_SIZE) * count), GFP_ATOMIC);
	skb->dev = (void *)hci_dev_get(0);
	bt_cb(skb)->pkt_type = HCI_SCODATA_PKT;
	skb_put(skb, ((sco_packet_bytes + HCI_SCO_HDR_SIZE) * count));
	if (!skb)
		return false;

	RTKBT_DBG("%s, buffer_pos: %d", __FUNCTION__, pSCOSnd->playback.buffer_pos);

	source = runtime->dma_area + pSCOSnd->playback.buffer_pos * frame_bytes;

	if (pSCOSnd->playback.buffer_pos + period_size <= runtime->buffer_size) {
	  memcpy(buffer, source, period_size * frame_bytes);
	} else {
	  /* wrap around at end of ring buffer */
	  frames1 = runtime->buffer_size - pSCOSnd->playback.buffer_pos;
	  memcpy(buffer, source, frames1 * frame_bytes);
	  memcpy(&buffer[frames1 * frame_bytes],
			 runtime->dma_area, (period_size - frames1) * frame_bytes);
	}

	pSCOSnd->playback.buffer_pos += period_size;
	if (pSCOSnd->playback.buffer_pos >= runtime->buffer_size)
	   pSCOSnd->playback.buffer_pos -= runtime->buffer_size;

	for (i = 0; i < count; i++) {
		*((__u16 *)(skb->data + i * (sco_packet_bytes + HCI_SCO_HDR_SIZE))) = pSCOSnd->usb_data->sco_handle;
		*((__u8 *)(skb->data + i*(sco_packet_bytes + HCI_SCO_HDR_SIZE) + 2)) = sco_packet_bytes;
		memcpy((skb->data + i * (sco_packet_bytes + HCI_SCO_HDR_SIZE) + HCI_SCO_HDR_SIZE),
		  &buffer[sco_packet_bytes * i], sco_packet_bytes);
	}

	if (test_bit(ALSA_PLAYBACK_RUNNING, &pSCOSnd->states)) {
		snd_pcm_period_elapsed(pSCOSnd->playback.substream);
	}
	snd_send_sco_frame(skb);
	return true;
}

static void btusb_isoc_snd_tx_complete(struct urb *urb)
{
	struct sk_buff *skb = urb->context;
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;
	struct btusb_data *data = GET_DRV_DATA(hdev);
	RTK_sco_card_t  *pSCOSnd = data->pSCOSnd;

	RTKBT_DBG("%s: status %d count %d",
			__func__, urb->status, urb->actual_length);

	if (skb && hdev) {
		if (!test_bit(HCI_RUNNING, &hdev->flags))
			goto done;

		if (!urb->status)
			hdev->stat.byte_tx += urb->transfer_buffer_length;
		else
			hdev->stat.err_tx++;
	} else
		RTKBT_ERR("%s: skb 0x%p hdev 0x%p", __func__, skb, hdev);

done:
	kfree(urb->setup_packet);
	kfree_skb(skb);
	if (test_bit(ALSA_PLAYBACK_RUNNING, &pSCOSnd->states)) {
		snd_copy_send_sco_data(pSCOSnd);
		//schedule_work(&pSCOSnd->send_sco_work);
	}
}

static void playback_work(struct work_struct *work)
{
	RTK_sco_card_t *pSCOSnd = container_of(work, RTK_sco_card_t, send_sco_work);

	snd_copy_send_sco_data(pSCOSnd);
}

#endif

static int btusb_send_frame(struct sk_buff *skb)
{
	struct hci_dev *hdev = (struct hci_dev *) skb->dev;

	struct btusb_data *data = GET_DRV_DATA(hdev);
	struct usb_ctrlrequest *dr;
	struct urb *urb;
	unsigned int pipe;
	int err;
	int retries = 0;

	RTKBT_DBG("%s: hdev %p, btusb data %p, pkt type %d",
			__func__, hdev, data, bt_cb(skb)->pkt_type);

	if (!test_bit(HCI_RUNNING, &hdev->flags))
		return -EBUSY;

	switch (bt_cb(skb)->pkt_type) {
	case HCI_COMMAND_PKT:
		print_command(skb);
		urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (!urb)
			return -ENOMEM;

		dr = kmalloc(sizeof(*dr), GFP_ATOMIC);
		if (!dr) {
			usb_free_urb(urb);
			return -ENOMEM;
		}

		dr->bRequestType = data->cmdreq_type;
		dr->bRequest	 = 0;
		dr->wIndex	   = 0;
		dr->wValue	   = 0;
		dr->wLength	  = __cpu_to_le16(skb->len);

		pipe = usb_sndctrlpipe(data->udev, 0x00);

		usb_fill_control_urb(urb, data->udev, pipe, (void *) dr,
				skb->data, skb->len, btusb_tx_complete, skb);

		hdev->stat.cmd_tx++;
		break;

	case HCI_ACLDATA_PKT:
		print_acl(skb, 1);
		if (!data->bulk_tx_ep)
			return -ENODEV;

		urb = usb_alloc_urb(0, GFP_ATOMIC);
		if (!urb)
			return -ENOMEM;

		pipe = usb_sndbulkpipe(data->udev,
					data->bulk_tx_ep->bEndpointAddress);

		usb_fill_bulk_urb(urb, data->udev, pipe,
				skb->data, skb->len, btusb_tx_complete, skb);

		hdev->stat.acl_tx++;
		break;

	case HCI_SCODATA_PKT:
		print_sco(skb, 1);
		if (!data->isoc_tx_ep || hdev->conn_hash.sco_num < 1) {
			kfree(skb);
			return -ENODEV;
		}

		urb = usb_alloc_urb(BTUSB_MAX_ISOC_FRAMES, GFP_ATOMIC);
		if (!urb) {
			RTKBT_ERR("%s: Failed to allocate mem for sco pkts", __func__);
			kfree(skb);
			return -ENOMEM;
		}

		pipe = usb_sndisocpipe(data->udev, data->isoc_tx_ep->bEndpointAddress);

		usb_fill_int_urb(urb, data->udev, pipe,
				skb->data, skb->len, btusb_isoc_tx_complete,
				skb, data->isoc_tx_ep->bInterval);

		urb->transfer_flags  = URB_ISO_ASAP;

		fill_isoc_descriptor(urb, skb->len,
				le16_to_cpu(data->isoc_tx_ep->wMaxPacketSize));

		hdev->stat.sco_tx++;
		goto skip_waking;

	default:
		return -EILSEQ;
	}

	err = inc_tx(data);
	if (err) {
		usb_anchor_urb(urb, &data->deferred);
		schedule_work(&data->waker);
		err = 0;
		goto done;
	}

skip_waking:
	usb_anchor_urb(urb, &data->tx_anchor);
retry:
	err = usb_submit_urb(urb, GFP_ATOMIC);
	if (err < 0) {
		RTKBT_ERR("%s: Failed to submit urb %p, pkt type %d, err %d, retries %d",
				__func__, urb, bt_cb(skb)->pkt_type, err, retries);
		if ((bt_cb(skb)->pkt_type != HCI_SCODATA_PKT) && (retries < 10)) {
			mdelay(1);

			if (bt_cb(skb)->pkt_type == HCI_COMMAND_PKT)
				print_error_command(skb);
			retries++;
			goto retry;
		}
		kfree(urb->setup_packet);
		usb_unanchor_urb(urb);
	} else
		usb_mark_last_busy(data->udev);
	usb_free_urb(urb);

done:
	return err;
}

#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 4, 0)
static void btusb_destruct(struct hci_dev *hdev)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);

	RTKBT_DBG("%s: name %s", __func__, hdev->name);

	kfree(data);
}
#endif

static void btusb_notify(struct hci_dev *hdev, unsigned int evt)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);

	RTKBT_DBG("%s: name %s, evt %d", __func__, hdev->name, evt);

	RTKBT_INFO("%s: hdev->conn_hash.sco_num= %d, data->sco_num = %d", __func__, hdev->conn_hash.sco_num,
	  data->sco_num);
	if (hdev->conn_hash.sco_num != data->sco_num) {
		data->sco_num = hdev->conn_hash.sco_num;
		schedule_work(&data->work);
	}
}

static inline int set_isoc_interface(struct hci_dev *hdev, int altsetting)
{
	struct btusb_data *data = GET_DRV_DATA(hdev);
	struct usb_interface *intf = data->isoc;
	struct usb_endpoint_descriptor *ep_desc;
	int i, err;

	if (!data->isoc)
		return -ENODEV;

	err = usb_set_interface(data->udev, 1, altsetting);
	if (err < 0) {
		RTKBT_ERR("%s: Failed to set interface, altsetting %d, err %d",
				__func__, altsetting, err);
		return err;
	}

	data->isoc_altsetting = altsetting;

	data->isoc_tx_ep = NULL;
	data->isoc_rx_ep = NULL;

	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
		ep_desc = &intf->cur_altsetting->endpoint[i].desc;

		if (!data->isoc_tx_ep && usb_endpoint_is_isoc_out(ep_desc)) {
			data->isoc_tx_ep = ep_desc;
			continue;
		}

		if (!data->isoc_rx_ep && usb_endpoint_is_isoc_in(ep_desc)) {
			data->isoc_rx_ep = ep_desc;
			continue;
		}
	}

	if (!data->isoc_tx_ep || !data->isoc_rx_ep) {
		RTKBT_ERR("%s: Invalid SCO descriptors", __func__);
		return -ENODEV;
	}

	return 0;
}

static int check_controller_support_msbc(struct usb_device *udev)
{
	//fix this in the future,when new card support msbc decode and encode
	RTKBT_INFO("%s:pid = 0x%02x, vid = 0x%02x", __func__, udev->descriptor.idProduct, udev->descriptor.idVendor);
	switch (udev->descriptor.idProduct) {
	default:
	  return 0;
	}
	return 0;
}

static void btusb_work(struct work_struct *work)
{
	struct btusb_data *data = container_of(work, struct btusb_data, work);
	struct hci_dev *hdev = data->hdev;
	struct sk_buff *skb;

	int err;
	int new_alts;
	if (data->sco_num > 0) {
		if (!test_bit(BTUSB_DID_ISO_RESUME, &data->flags)) {
			err = usb_autopm_get_interface(data->isoc ? data->isoc : data->intf);
			if (err < 0) {
				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
				mdelay(URB_CANCELING_DELAY_MS);
				usb_kill_anchored_urbs(&data->isoc_anchor);
				return;
			}

			set_bit(BTUSB_DID_ISO_RESUME, &data->flags);
		}

		RTKBT_INFO("%s voice settings = 0x%04x", __func__, hdev->voice_setting);
		if (!(hdev->voice_setting & 0x0003)) {
			if (data->sco_num == 1)
				new_alts = 2;
			else {
			  RTKBT_ERR("%s: we don't support mutiple sco link for cvsd", __func__);
			  return;
			}
		} else {
			if (check_controller_support_msbc(data->udev)) {
				if (data->sco_num == 1)
					new_alts = 4;
				else {
					RTKBT_ERR("%s: we don't support mutiple sco link for msbc", __func__);
					return;
				}
			} else {
				new_alts = 2;
			}
		}
		if (data->isoc_altsetting != new_alts) {

			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
			mdelay(URB_CANCELING_DELAY_MS);
			usb_kill_anchored_urbs(&data->isoc_anchor);

			if (hdev->reassembly[HCI_SCODATA_PKT - 1]) {
				skb = hdev->reassembly[HCI_SCODATA_PKT - 1];
				hdev->reassembly[HCI_SCODATA_PKT - 1] = NULL;
				kfree_skb(skb);
			}
			if (set_isoc_interface(hdev, new_alts) < 0)
				return;
		}

		if (!test_and_set_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
			if (btusb_submit_isoc_urb(hdev, GFP_KERNEL) < 0)
				clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
			else
				btusb_submit_isoc_urb(hdev, GFP_KERNEL);
		}
#ifdef CONFIG_SCO_OVER_HCI
		if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
			set_bit(USB_CAPTURE_RUNNING, &data->pSCOSnd->states);
			set_bit(USB_PLAYBACK_RUNNING, &data->pSCOSnd->states);
		}
#endif
	} else {
		clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
#ifdef CONFIG_SCO_OVER_HCI
		clear_bit(USB_CAPTURE_RUNNING, &data->pSCOSnd->states);
		clear_bit(USB_PLAYBACK_RUNNING, &data->pSCOSnd->states);
#endif
		mdelay(URB_CANCELING_DELAY_MS);
		usb_kill_anchored_urbs(&data->isoc_anchor);

		set_isoc_interface(hdev, 0);

		if (test_and_clear_bit(BTUSB_DID_ISO_RESUME, &data->flags))
			usb_autopm_put_interface(data->isoc ? data->isoc : data->intf);
	}
}

static void btusb_waker(struct work_struct *work)
{
	struct btusb_data *data = container_of(work, struct btusb_data, waker);
	int err;

	RTKBT_DBG("%s: PM usage count %d", __func__,
#if LINUX_VERSION_CODE < KERNEL_VERSION(4, 9, 0)
		  atomic_read(&data->intf->pm_usage_cnt)
#else
		  0
#endif
	);

	err = usb_autopm_get_interface(data->intf);
	if (err < 0)
		return;

	usb_autopm_put_interface(data->intf);
}


//#ifdef CONFIG_HAS_EARLYSUSPEND
#if 0
static void btusb_early_suspend(struct early_suspend *h)
{
	struct btusb_data *data;
	firmware_info *fw_info;
	patch_info *patch_entry;

	RTKBT_INFO("%s", __func__);

	data = container_of(h, struct btusb_data, early_suspend);
	fw_info = data->fw_info;
	patch_entry = fw_info->patch_entry;

	patch_entry->fw_len = load_firmware(fw_info, &patch_entry->fw_cache);
	if (patch_entry->fw_len <= 0) {
		/* We may encount failure in loading firmware, just give a warning */
		RTKBT_WARN("%s: Failed to load firmware", __func__);
	}
}

static void btusb_late_resume(struct early_suspend *h)
{
	struct btusb_data *data;
	firmware_info *fw_info;
	patch_info *patch_entry;

	RTKBT_INFO("%s", __func__);

	data = container_of(h, struct btusb_data, early_suspend);
	fw_info = data->fw_info;
	patch_entry = fw_info->patch_entry;

	/* Reclaim fw buffer when bt usb resumed */
	if (patch_entry->fw_len > 0) {
		kfree(patch_entry->fw_cache);
		patch_entry->fw_cache = NULL;
		patch_entry->fw_len = 0;
	}
}
#else
int bt_pm_notify(struct notifier_block *notifier, ulong pm_event, void *unused)
{
	struct btusb_data *data;
	firmware_info *fw_info;
	patch_info *patch_entry;
	struct usb_device *udev;

	RTKBT_INFO("%s: pm event %ld", __func__, pm_event);

	data = container_of(notifier, struct btusb_data, pm_notifier);
	fw_info = data->fw_info;
	patch_entry = fw_info->patch_entry;
	udev = fw_info->udev;

	switch (pm_event) {
	case PM_SUSPEND_PREPARE:
	case PM_HIBERNATION_PREPARE:
#if 0
		patch_entry->fw_len = load_firmware(fw_info, &patch_entry->fw_cache);
		if (patch_entry->fw_len <= 0) {
		/* We may encount failure in loading firmware, just give a warning */
			RTKBT_WARN("%s: Failed to load firmware", __func__);
		}
#endif
		if (!device_may_wakeup(&udev->dev)) {
#if (CONFIG_RESET_RESUME || CONFIG_BLUEDROID)
			RTKBT_INFO("%s:remote wakeup not supported, reset resume supported", __func__);
#else
			fw_info->intf->needs_binding = 1;
			RTKBT_INFO("%s:remote wakeup not supported, binding needed", __func__);
#endif
		}
		break;

	case PM_POST_SUSPEND:
	case PM_POST_HIBERNATION:
	case PM_POST_RESTORE:
#if 0
		/* Reclaim fw buffer when bt usb resumed */
		if (patch_entry->fw_len > 0) {
			kfree(patch_entry->fw_cache);
			patch_entry->fw_cache = NULL;
			patch_entry->fw_len = 0;
		}
#endif

#if BTUSB_RPM
		usb_disable_autosuspend(udev);
		usb_enable_autosuspend(udev);
		pm_runtime_set_autosuspend_delay(&(udev->dev), 2000);
#endif
		break;

	default:
		break;
	}

	return NOTIFY_DONE;
}

int bt_reboot_notify(struct notifier_block *notifier, ulong pm_event, void *unused)
{
	struct btusb_data *data;
	firmware_info *fw_info;
	patch_info *patch_entry;
	struct usb_device *udev;

	RTKBT_INFO("%s: pm event %ld", __func__, pm_event);

	data = container_of(notifier, struct btusb_data, reboot_notifier);
	fw_info = data->fw_info;
	patch_entry = fw_info->patch_entry;
	udev = fw_info->udev;

	switch (pm_event) {
	case SYS_DOWN:
		RTKBT_DBG("%s:system down or restart", __func__);
	break;

	case SYS_HALT:
	case SYS_POWER_OFF:
#if SUSPNED_DW_FW
		cancel_work_sync(&data->work);

		btusb_stop_traffic(data);
		mdelay(URB_CANCELING_DELAY_MS);
		usb_kill_anchored_urbs(&data->tx_anchor);

		if (fw_info_4_suspend) {
			download_suspend_patch(fw_info_4_suspend, 1);
		} else {
			RTKBT_ERR("%s: Failed to download suspend fw", __func__);
		}
#endif

#if SET_WAKEUP_DEVICE
		set_wakeup_device_from_conf(fw_info_4_suspend);
#endif
		RTKBT_DBG("%s:system halt or power off", __func__);
	break;

	default:
		break;
	}

	return NOTIFY_DONE;
}

#endif

#ifdef CONFIG_SCO_OVER_HCI
static const struct snd_pcm_hardware snd_card_sco_capture_default = {
	.info             = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_NONINTERLEAVED |
						SNDRV_PCM_ACCESS_RW_INTERLEAVED | SNDRV_PCM_INFO_FIFO_IN_FRAMES),
	.formats          = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S8,
	.rates            = (SNDRV_PCM_RATE_8000),
	.rate_min         = 8000,
	.rate_max         = 8000,
	.channels_min     = 1,
	.channels_max     = 1,
	.buffer_bytes_max = 8 * 768,
	.period_bytes_min = 48,
	.period_bytes_max = 768,
	.periods_min      = 1,
	.periods_max      = 8,
	.fifo_size        = 8,
};

static int snd_sco_capture_pcm_open(struct snd_pcm_substream *substream)
{
	RTK_sco_card_t  *pSCOSnd = substream->private_data;

	RTKBT_INFO("%s", __FUNCTION__);
	pSCOSnd->capture.substream = substream;

	memcpy(&substream->runtime->hw, &snd_card_sco_capture_default, sizeof(struct snd_pcm_hardware));

	if (check_controller_support_msbc(pSCOSnd->dev)) {
		substream->runtime->hw.rates |= SNDRV_PCM_RATE_16000;
		substream->runtime->hw.rate_max = 16000;
		substream->runtime->hw.period_bytes_min = 96;
		substream->runtime->hw.period_bytes_max = 16 * 96;
		substream->runtime->hw.buffer_bytes_max = 8 * 16 * 96;
	}
	set_bit(ALSA_CAPTURE_OPEN, &pSCOSnd->states);
	return 0;
}

static int snd_sco_capture_pcm_close(struct snd_pcm_substream *substream)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;

	clear_bit(ALSA_CAPTURE_OPEN, &pSCOSnd->states);
	return 0;
}

static int snd_sco_capture_ioctl(struct snd_pcm_substream *substream, unsigned int cmd, void *arg)
{
	RTKBT_DBG("%s, cmd = %d", __FUNCTION__, cmd);
	switch (cmd) {
	default:
		return snd_pcm_lib_ioctl(substream, cmd, arg);
	}
	return 0;
}

static int snd_sco_capture_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params)
{
	int err;
	struct snd_pcm_runtime *runtime = substream->runtime;
	err = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params));
	RTKBT_INFO("%s,err : %d,  runtime state : %d", __FUNCTION__, err, runtime->status->state);
	return err;
}

static int snd_sco_capture_pcm_hw_free(struct snd_pcm_substream *substream)
{
	RTKBT_DBG("%s", __FUNCTION__);
	return snd_pcm_lib_free_vmalloc_buffer(substream);;
}

static int snd_sco_capture_pcm_prepare(struct snd_pcm_substream *substream)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;

	RTKBT_INFO("%s", __FUNCTION__);
	if (test_bit(DISCONNECTED, &pSCOSnd->states))
			return -ENODEV;
	if (!test_bit(USB_CAPTURE_RUNNING, &pSCOSnd->states))
			return -EIO;

	if (runtime->rate == 8000) {
		if (pSCOSnd->usb_data->isoc_altsetting != 2)
			return -ENOEXEC;
		pSCOSnd->capture.sco_packet_bytes = 48;
	} else if (runtime->rate == 16000 && check_controller_support_msbc(pSCOSnd->dev)) {
		if (pSCOSnd->usb_data->isoc_altsetting != 4)
			return -ENOEXEC;
		pSCOSnd->capture.sco_packet_bytes = 96;
	} else if (pSCOSnd->usb_data->isoc_altsetting == 2) {
		pSCOSnd->capture.sco_packet_bytes = 48;
	} else if (pSCOSnd->usb_data->isoc_altsetting == 1) {
		pSCOSnd->capture.sco_packet_bytes = 24;
	}
	return 0;
}

static int snd_sco_capture_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;
	RTKBT_INFO("%s, cmd : %d", __FUNCTION__, cmd);

	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		if (!test_bit(USB_CAPTURE_RUNNING, &pSCOSnd->states))
			return -EIO;
		set_bit(ALSA_CAPTURE_RUNNING, &pSCOSnd->states);
			return 0;
	case SNDRV_PCM_TRIGGER_STOP:
		clear_bit(ALSA_CAPTURE_RUNNING, &pSCOSnd->states);
		return 0;
	default:
		return -EINVAL;
	}
}

static snd_pcm_uframes_t snd_sco_capture_pcm_pointer(struct snd_pcm_substream *substream)
{
	  RTK_sco_card_t *pSCOSnd = substream->private_data;

	  return pSCOSnd->capture.buffer_pos;
}

static struct snd_pcm_ops snd_sco_capture_pcm_ops = {
	.open =		 snd_sco_capture_pcm_open,
	.close =		snd_sco_capture_pcm_close,
	.ioctl =		snd_sco_capture_ioctl,
	.hw_params =	snd_sco_capture_pcm_hw_params,
	.hw_free =	  snd_sco_capture_pcm_hw_free,
	.prepare =	  snd_sco_capture_pcm_prepare,
	.trigger =	  snd_sco_capture_pcm_trigger,
	.pointer =	  snd_sco_capture_pcm_pointer,
};

static const struct snd_pcm_hardware snd_card_sco_playback_default = {
	.info			   = (SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_NONINTERLEAVED |
							SNDRV_PCM_ACCESS_RW_INTERLEAVED | SNDRV_PCM_INFO_FIFO_IN_FRAMES),
	.formats			= SNDRV_PCM_FMTBIT_S16_LE,
	.rates			  = (SNDRV_PCM_RATE_8000),
	.rate_min		   = 8000,
	.rate_max		   = 8000,
	.channels_min	   = 1,
	.channels_max	   = 1,
	.buffer_bytes_max   = 8 * 768,
	.period_bytes_min   = 48,
	.period_bytes_max   = 768,
	.periods_min		= 1,
	.periods_max		= 8,
	.fifo_size		  = 8,
};

static int snd_sco_playback_pcm_open(struct snd_pcm_substream *substream)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;
	int err = 0;

	RTKBT_INFO("%s, rate : %d", __FUNCTION__, substream->runtime->rate);
	memcpy(&substream->runtime->hw, &snd_card_sco_playback_default, sizeof(struct snd_pcm_hardware));
	if (check_controller_support_msbc(pSCOSnd->dev)) {
		substream->runtime->hw.rates |= SNDRV_PCM_RATE_16000;
		substream->runtime->hw.rate_max = 16000;
		substream->runtime->hw.period_bytes_min = 96;
		substream->runtime->hw.period_bytes_max = 16 * 96;
		substream->runtime->hw.buffer_bytes_max = 8 * 16 * 96;
	}
	pSCOSnd->playback.substream = substream;
	set_bit(ALSA_PLAYBACK_OPEN, &pSCOSnd->states);

	return err;
}

static int snd_sco_playback_pcm_close(struct snd_pcm_substream *substream)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;

	  clear_bit(ALSA_PLAYBACK_OPEN, &pSCOSnd->states);
	cancel_work_sync(&pSCOSnd->send_sco_work);
	  return 0;
}

static int snd_sco_playback_ioctl(struct snd_pcm_substream *substream,  unsigned int cmd, void *arg)
{
	RTKBT_DBG("%s, cmd : %d", __FUNCTION__, cmd);
	switch (cmd) {
	default:
		return snd_pcm_lib_ioctl(substream, cmd, arg);
		break;
	}
	return 0;
}

static int snd_sco_playback_pcm_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *hw_params)
{
	int err;
	err = snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(hw_params));
	return err;
}

static int snd_sco_palyback_pcm_hw_free(struct snd_pcm_substream *substream)
{
	RTKBT_DBG("%s", __FUNCTION__);
	return snd_pcm_lib_free_vmalloc_buffer(substream);
}

static int snd_sco_playback_pcm_prepare(struct snd_pcm_substream *substream)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;
	struct snd_pcm_runtime *runtime = substream->runtime;

	RTKBT_INFO("%s, bound_rate = %d", __FUNCTION__, runtime->rate);

	if (test_bit(DISCONNECTED, &pSCOSnd->states))
		return -ENODEV;
	if (!test_bit(USB_PLAYBACK_RUNNING, &pSCOSnd->states))
		return -EIO;

	if (runtime->rate == 8000) {
		if (pSCOSnd->usb_data->isoc_altsetting != 2)
			return -ENOEXEC;
		pSCOSnd->playback.sco_packet_bytes = 48;
	} else if (runtime->rate == 16000) {
		if (pSCOSnd->usb_data->isoc_altsetting != 4)
			return -ENOEXEC;
		pSCOSnd->playback.sco_packet_bytes = 96;
	}

	return 0;
}

static int snd_sco_playback_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
	RTK_sco_card_t *pSCOSnd = substream->private_data;

	RTKBT_INFO("%s, cmd = %d", __FUNCTION__, cmd);
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		if (!test_bit(USB_PLAYBACK_RUNNING, &pSCOSnd->states))
			return -EIO;
		set_bit(ALSA_PLAYBACK_RUNNING, &pSCOSnd->states);
		schedule_work(&pSCOSnd->send_sco_work);
		return 0;
	case SNDRV_PCM_TRIGGER_STOP:
		clear_bit(ALSA_PLAYBACK_RUNNING, &pSCOSnd->states);
		return 0;
	default:
		return -EINVAL;
	}
}

static snd_pcm_uframes_t snd_sco_playback_pcm_pointer(struct snd_pcm_substream *substream)
{
	  RTK_sco_card_t *pSCOSnd = substream->private_data;

	  return pSCOSnd->playback.buffer_pos;
}


static struct snd_pcm_ops snd_sco_playback_pcm_ops = {
	.open =		 snd_sco_playback_pcm_open,
	.close =		snd_sco_playback_pcm_close,
	.ioctl =		snd_sco_playback_ioctl,
	.hw_params =	snd_sco_playback_pcm_hw_params,
	.hw_free =	  snd_sco_palyback_pcm_hw_free,
	.prepare =	  snd_sco_playback_pcm_prepare,
	.trigger =	  snd_sco_playback_pcm_trigger,
	.pointer =	  snd_sco_playback_pcm_pointer,
};


static RTK_sco_card_t *btusb_snd_init(struct usb_interface *intf, const struct usb_device_id *id, struct btusb_data *data)
{
	struct snd_card *card;
	RTK_sco_card_t  *pSCOSnd;
	int err = 0;
	RTKBT_INFO("%s", __func__);
	err = snd_card_new(&intf->dev,
	 -1, RTK_SCO_ID, THIS_MODULE,
	 sizeof(RTK_sco_card_t), &card);
	if (err < 0) {
		RTKBT_ERR("%s: sco snd card create fail", __func__);
		return NULL;
	}
	// private data
	pSCOSnd = (RTK_sco_card_t *)card->private_data;
	pSCOSnd->card = card;
	pSCOSnd->dev = interface_to_usbdev(intf);
	pSCOSnd->usb_data = data;

	strcpy(card->driver, RTK_SCO_ID);
	strcpy(card->shortname, "Realtek sco snd");
	sprintf(card->longname, "Realtek sco over hci: VID:0x%04x, PID:0x%04x",
		id->idVendor, pSCOSnd->dev->descriptor.idProduct);

	err = snd_pcm_new(card, RTK_SCO_ID, 0, 1, 1, &pSCOSnd->pcm);
	if (err < 0) {
		RTKBT_ERR("%s: sco snd card new pcm fail", __func__);
		snd_card_free(card);
		return NULL;
	}
	pSCOSnd->pcm->private_data = pSCOSnd;
	sprintf(pSCOSnd->pcm->name, "sco_pcm:VID:0x%04x, PID:0x%04x",
	  id->idVendor, pSCOSnd->dev->descriptor.idProduct);

	snd_pcm_set_ops(pSCOSnd->pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_sco_playback_pcm_ops);
	snd_pcm_set_ops(pSCOSnd->pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_sco_capture_pcm_ops);

	err = snd_card_register(card);
	if (err < 0) {
		RTKBT_ERR("%s: sco snd card register card fail", __func__);
		snd_card_free(card);
		return NULL;
	}

	spin_lock_init(&pSCOSnd->capture_lock);
	spin_lock_init(&pSCOSnd->playback_lock);
	INIT_WORK(&pSCOSnd->send_sco_work, playback_work);
	return pSCOSnd;
}

static void btusb_snd_remove(RTK_sco_card_t  *pSCOSnd)
{
	if (!pSCOSnd) {
		RTKBT_ERR("%s: sco private data is null", __func__);
		return;
	}
	set_bit(DISCONNECTED, &pSCOSnd->states);
	snd_card_disconnect(pSCOSnd->card);
	snd_card_free_when_closed(pSCOSnd->card);
}
#endif

static int btusb_probe(struct usb_interface *intf, const struct usb_device_id *id)
{
	struct usb_device *udev = interface_to_usbdev(intf);
	struct usb_endpoint_descriptor *ep_desc;
	struct btusb_data *data;
	struct hci_dev *hdev;
	firmware_info *fw_info;
	int i, err = 0;

	RTKBT_INFO("%s: usb_interface %p, bInterfaceNumber %d, idVendor 0x%04x, "
			"idProduct 0x%04x", __func__, intf,
			intf->cur_altsetting->desc.bInterfaceNumber,
			id->idVendor, id->idProduct);

	/* interface numbers are hardcoded in the spec */
	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return -ENODEV;

	RTKBT_DBG("%s: can wakeup = %x, may wakeup = %x", __func__,
			device_can_wakeup(&udev->dev), device_may_wakeup(&udev->dev));

	data = rtk_alloc(intf);
	if (!data)
		return -ENOMEM;

	for (i = 0; i < intf->cur_altsetting->desc.bNumEndpoints; i++) {
		ep_desc = &intf->cur_altsetting->endpoint[i].desc;

		if (!data->intr_ep && usb_endpoint_is_int_in(ep_desc)) {
			data->intr_ep = ep_desc;
			continue;
		}

		if (!data->bulk_tx_ep && usb_endpoint_is_bulk_out(ep_desc)) {
			data->bulk_tx_ep = ep_desc;
			continue;
		}

		if (!data->bulk_rx_ep && usb_endpoint_is_bulk_in(ep_desc)) {
			data->bulk_rx_ep = ep_desc;
			continue;
		}
	}

	if (!data->intr_ep || !data->bulk_tx_ep || !data->bulk_rx_ep) {
		rtk_free(data);
		return -ENODEV;
	}

	data->cmdreq_type = USB_TYPE_CLASS;

	data->udev = udev;
	data->intf = intf;

	spin_lock_init(&queue_lock);
	spin_lock_init(&running_flag_lock);
	spin_lock_init(&data->lock);

	INIT_WORK(&data->work, btusb_work);
	INIT_WORK(&data->waker, btusb_waker);
	spin_lock_init(&data->txlock);

	init_usb_anchor(&data->tx_anchor);
	init_usb_anchor(&data->intr_anchor);
	init_usb_anchor(&data->bulk_anchor);
	init_usb_anchor(&data->isoc_anchor);
	init_usb_anchor(&data->deferred);

	fw_info = firmware_info_init(intf);
	if (fw_info)
		data->fw_info = fw_info;
	else {
		RTKBT_WARN("%s: Failed to initialize fw info", __func__);
		/* Skip download patch */
		goto end;
	}

	hdev = hci_alloc_dev();
	if (!hdev) {
		rtk_free(data);
		data = NULL;
		return -ENOMEM;
	}

	HDEV_BUS = HCI_USB;

	data->hdev = hdev;

	SET_HCIDEV_DEV(hdev, &intf->dev);

	hdev->open	 = btusb_open;
	hdev->close	= btusb_close;
	hdev->flush	= btusb_flush;
	hdev->send	 = btusb_send_frame;
	hdev->notify   = btusb_notify;

#if LINUX_VERSION_CODE > KERNEL_VERSION(3, 4, 0)
	hci_set_drvdata(hdev, data);
#else
	hdev->driver_data = data;
	hdev->destruct = btusb_destruct;
	hdev->owner = THIS_MODULE;
#endif

	/* Interface numbers are hardcoded in the specification */
	data->isoc = usb_ifnum_to_if(data->udev, 1);
	if (data->isoc) {
		err = usb_driver_claim_interface(&btusb_driver,
							data->isoc, data);
		if (err < 0) {
			hci_free_dev(hdev);
			hdev = NULL;
			rtk_free(data);
			data = NULL;
			return err;
		}
#ifdef CONFIG_SCO_OVER_HCI
		data->pSCOSnd = btusb_snd_init(intf, id, data);
#endif
	}

	err = hci_register_dev(hdev);
	if (err < 0) {
		hci_free_dev(hdev);
		hdev = NULL;
		rtk_free(data);
		data = NULL;
		return err;
	}

	usb_set_intfdata(intf, data);

//#ifdef CONFIG_HAS_EARLYSUSPEND
#if 0
	data->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN;
	data->early_suspend.suspend = btusb_early_suspend;
	data->early_suspend.resume = btusb_late_resume;
	register_early_suspend(&data->early_suspend);
#else
	data->pm_notifier.notifier_call = bt_pm_notify;
	data->reboot_notifier.notifier_call = bt_reboot_notify;
	register_pm_notifier(&data->pm_notifier);
	register_reboot_notifier(&data->reboot_notifier);
#endif

#if CONFIG_BLUEDROID
	RTKBT_INFO("%s: Check bt reset flag %d", __func__, bt_reset);
	/* Report hci hardware error after everthing is ready,
	 * especially hci register is completed. Or, btchr_poll
	 * will get null hci dev when hotplug in.
	 */
	if (bt_reset == 1) {
		hci_hardware_error();
		bt_reset = 0;
	} else
		bt_reset = 0; /* Clear and reset it anyway */
#endif

	load_firmware_info(fw_info);

end:
	set_driver_state_value(DEVICE_PROBED);
	return 0;
}

static void btusb_disconnect(struct usb_interface *intf)
{
	struct btusb_data *data;
	struct hci_dev *hdev = NULL;

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return;

	clear_driver_state(DEVICE_PROBED);
	if ((get_driver_state_value() & CHAR_OPENED) == CHAR_OPENED)
		wake_up_interruptible(&btchr_read_wait);

	wait_event_interruptible(bt_drv_state_wait, ((get_driver_state_value() & CHAR_OPENED) == 0));

	RTKBT_INFO("%s: usb_interface %p, bInterfaceNumber %d",
			__func__, intf, intf->cur_altsetting->desc.bInterfaceNumber);

	data = usb_get_intfdata(intf);

	if (data)
		hdev = data->hdev;
	else {
		RTKBT_WARN("%s: Failed to get bt usb data[Null]", __func__);
		return;
	}

#ifdef CONFIG_SCO_OVER_HCI
	if (intf->cur_altsetting->desc.bInterfaceNumber == 0) {
		RTK_sco_card_t *pSCOSnd = data->pSCOSnd;
		btusb_snd_remove(pSCOSnd);
	}
#endif

//#ifdef CONFIG_HAS_EARLYSUSPEND
#if 0
	unregister_early_suspend(&data->early_suspend);
#else
	unregister_pm_notifier(&data->pm_notifier);
	unregister_reboot_notifier(&data->reboot_notifier);
#endif

	firmware_info_destroy(intf);

#if CONFIG_BLUEDROID
	if (test_bit(HCI_RUNNING, &hdev->flags)) {
		RTKBT_INFO("%s: Set BT reset flag", __func__);
		bt_reset = 1;
	}
#endif

	usb_set_intfdata(data->intf, NULL);

	if (data->isoc)
		usb_set_intfdata(data->isoc, NULL);

	hci_unregister_dev(hdev);

	if (intf == data->isoc)
		usb_driver_release_interface(&btusb_driver, data->intf);
	else if (data->isoc)
		usb_driver_release_interface(&btusb_driver, data->isoc);

#if !CONFIG_BLUEDROID
#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 4, 0)
	__hci_dev_put(hdev);
#endif
#endif

	hci_free_dev(hdev);
	rtk_free(data);
	data = NULL;
	set_driver_state_value(0);
}

#ifdef CONFIG_PM
static int btusb_suspend(struct usb_interface *intf, pm_message_t message)
{
	struct btusb_data *data = usb_get_intfdata(intf);
	firmware_info *fw_info = data->fw_info;

	RTKBT_INFO("%s: event 0x%x, suspend count %d", __func__,
			message.event, data->suspend_count);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return 0;

	if (!test_bit(HCI_RUNNING, &data->hdev->flags))
		set_bt_onoff(fw_info, 1);

	if (data->suspend_count++)
		return 0;

	spin_lock_irq(&data->txlock);
	if (!((message.event & PM_EVENT_AUTO) && data->tx_in_flight)) {
		set_bit(BTUSB_SUSPENDING, &data->flags);
		spin_unlock_irq(&data->txlock);
	} else {
		spin_unlock_irq(&data->txlock);
		data->suspend_count--;
		RTKBT_ERR("%s: Failed to enter suspend", __func__);
		return -EBUSY;
	}

	cancel_work_sync(&data->work);

	btusb_stop_traffic(data);
	mdelay(URB_CANCELING_DELAY_MS);
	usb_kill_anchored_urbs(&data->tx_anchor);

#if SUSPNED_DW_FW
	if (fw_info_4_suspend) {
		download_suspend_patch(fw_info_4_suspend, 1);
	} else
		RTKBT_ERR("%s: Failed to download suspend fw", __func__);
#endif

#if SET_WAKEUP_DEVICE
	set_wakeup_device_from_conf(fw_info_4_suspend);
#endif

	return 0;
}

static void play_deferred(struct btusb_data *data)
{
	struct urb *urb;
	int err;

	while ((urb = usb_get_from_anchor(&data->deferred))) {
		usb_anchor_urb(urb, &data->tx_anchor);
		err = usb_submit_urb(urb, GFP_ATOMIC);
		if (err < 0) {
			RTKBT_ERR("%s: Failed to submit urb %p, err %d",
					__func__, urb, err);
			kfree(urb->setup_packet);
			usb_unanchor_urb(urb);
		} else {
			usb_mark_last_busy(data->udev);
		}
		usb_free_urb(urb);

		data->tx_in_flight++;
	}
	mdelay(URB_CANCELING_DELAY_MS);
	usb_scuttle_anchored_urbs(&data->deferred);
}

static int btusb_resume(struct usb_interface *intf)
{
	struct btusb_data *data = usb_get_intfdata(intf);
	struct hci_dev *hdev = data->hdev;
	firmware_info *fw_info = data->fw_info;
	int err = 0;

	RTKBT_INFO("%s: Suspend count %d", __func__, data->suspend_count);

	if (intf->cur_altsetting->desc.bInterfaceNumber != 0)
		return 0;

	if (--data->suspend_count)
		return 0;

	/*check_fw_version to check the status of the BT Controller after USB Resume*/
	err = check_fw_version(fw_info, true);
	if (err != 0) {
		RTKBT_INFO("%s: BT Controller Power OFF And Return hci_hardware_error:%d", __func__, err);
		hci_hardware_error();
	}

	if (test_bit(BTUSB_INTR_RUNNING, &data->flags)) {
		err = btusb_submit_intr_urb(hdev, GFP_NOIO);
		if (err < 0) {
			clear_bit(BTUSB_INTR_RUNNING, &data->flags);
			goto failed;
		}
	}

	if (test_bit(BTUSB_BULK_RUNNING, &data->flags)) {
		err = btusb_submit_bulk_urb(hdev, GFP_NOIO);
		if (err < 0) {
			clear_bit(BTUSB_BULK_RUNNING, &data->flags);
			goto failed;
		}

		btusb_submit_bulk_urb(hdev, GFP_NOIO);
	}

	if (test_bit(BTUSB_ISOC_RUNNING, &data->flags)) {
		if (btusb_submit_isoc_urb(hdev, GFP_NOIO) < 0)
			clear_bit(BTUSB_ISOC_RUNNING, &data->flags);
		else
			btusb_submit_isoc_urb(hdev, GFP_NOIO);
	}

	spin_lock_irq(&data->txlock);
	play_deferred(data);
	clear_bit(BTUSB_SUSPENDING, &data->flags);
	spin_unlock_irq(&data->txlock);
	schedule_work(&data->work);

	return 0;

failed:
	mdelay(URB_CANCELING_DELAY_MS);
	usb_scuttle_anchored_urbs(&data->deferred);
	spin_lock_irq(&data->txlock);
	clear_bit(BTUSB_SUSPENDING, &data->flags);
	spin_unlock_irq(&data->txlock);

	return err;
}
#endif

static struct usb_driver btusb_driver = {
	.name		= "rtk_btusb",
	.probe		= btusb_probe,
	.disconnect	= btusb_disconnect,
#ifdef CONFIG_PM
	.suspend	= btusb_suspend,
	.resume		= btusb_resume,
#endif
#if CONFIG_RESET_RESUME
	.reset_resume	= btusb_resume,
#endif
	.id_table	= btusb_table,
	.supports_autosuspend = 1,
#if LINUX_VERSION_CODE > KERNEL_VERSION(3, 7, 1)
	.disable_hub_initiated_lpm = 1,
#endif
};

static int __init btusb_init(void)
{
	int err;

	RTKBT_INFO("RTKBT_RELEASE_NAME: %s", RTKBT_RELEASE_NAME);
	RTKBT_INFO("Realtek Bluetooth USB driver module init, version %s", VERSION);
	driver_state = 0;
#if CONFIG_BLUEDROID
	err = btchr_init();
	if (err < 0) {
		/* usb register will go on, even bt char register failed */
		RTKBT_ERR("Failed to register usb char device interfaces");
	} else
	  set_driver_state_value(DRIVER_ON);
#endif
	err = usb_register(&btusb_driver);
	if (err < 0)
		RTKBT_ERR("Failed to register RTK bluetooth USB driver");
	return err;
}

static void __exit btusb_exit(void)
{
	struct hci_dev *hdev;
	RTKBT_INFO("Realtek Bluetooth USB driver module exit");
#if CONFIG_BLUEDROID
	clear_driver_state(DRIVER_ON);
	hdev = hci_dev_get(0);
	while (hdev && atomic_read(&hdev->promisc)) {
		RTKBT_ERR("%s: rtkbt driver is being removed, but application is still running!", __func__);
		RTKBT_ERR("%s: wait bt application to stop, or the driver can't be removed", __func__);
		mdelay(100);
	}
	btchr_exit();
#endif
	usb_deregister(&btusb_driver);
}

module_init(btusb_init);
module_exit(btusb_exit);


module_param(mp_drv_mode, int, 0644);
MODULE_PARM_DESC(mp_drv_mode, "0: NORMAL; 1: MP MODE");


MODULE_AUTHOR("Realtek Corporation");
MODULE_DESCRIPTION("Realtek Bluetooth USB driver version");
MODULE_VERSION(VERSION);
MODULE_LICENSE("GPL");
